1. Ann was made her suitcase.
a) to open b) opening c) open
2. Do you know how to his house?
a) getting b) get c) to get
3. I remember door.
a) locking b) to lock c) to be locked
4. The coat is dirty. It needs
a) to clean b) clean c) cleaning
5. I bought a new car instead of to America.
a) to fly b) fly c) flying
6. He is looking forward to them again.
a) see b) have seen c) seeing
7. She was busy in the garden.
a) working b) to work c) to be working
8. I don't enjoy very much.
a) driving b) drive c) drove
9. I can't afford tonight. I'm too tired.
a) to be going out b) to go out c) go out
10. His mother made him the room.
a) to clean b) cleaning c) clean
11. Has it stopped yet?
a) rain b) to be rain c) raining
12. Can you remind me some coffee?
a) to buy b) buy c) having bought
13. Why do you keep me questions?
a) being asked b) asked c) asking
14. I refuse his questions
a) to answer b) answer c) having answered
15. I've enjoyed them.
a) meet b) meeting c) being met
16. The girl began at night.
a) cry b) to cry c) having cried
17. He is against the discussion of this issue.
a) postpone b) having postpone c) postponing
18. I can't stand here any longer.
a) work b) being work c) working
19. They translated the story into English without a dictionary.
a) to use b) use c) using
20. in that country all his life, he knew it very well.

1. Ann was made her suitcase.
- The correct answer is c) open. The sentence is in passive voice, and "open" is an adjective that describes the state of the suitcase. The verb "was made" indicates that someone forced Ann to do something, and in this case, it is making her suitcase open.

2. Do you know how to his house?
- The correct answer is b) get. The verb "know" is followed by the infinitive form of the verb, without "to". Therefore, the sentence should be "Do you know how to get to his house?"

3. I remember door.
- The correct answer is a) locking. In this sentence, the verb "remember" is followed by the gerund form of the verb, which is "locking". The gerund is used to indicate an action that someone remembers doing in the past.

4. The coat is dirty. It needs
- The correct answer is c) cleaning. The sentence requires a noun form to complete the sentence, and "cleaning" is the correct noun form of the verb "clean". It indicates the action that the coat needs.

5. I bought a new car instead of to America.
- The correct answer is a) to fly. Instead of "to America," the sentence should be "I bought a new car instead of flying to America." The verb "instead of" is followed by the gerund form of the verb, which is "flying".

6. He is looking forward to them again.
- The correct answer is c) seeing. The phrase "looking forward to" is followed by the gerund form of the verb, which is "seeing". It indicates the action that he is anticipating.

7. She was busy in the garden.
- The correct answer is a) working. The verb "busy" is followed by the gerund form of the verb, which is "working". It indicates the activity that she was engaged in.

8. I don't enjoy very much.
- The correct answer is a) driving. The verb "enjoy" is followed by the gerund form of the verb, which is "driving". It indicates the activity that the speaker does not enjoy.

9. I can't afford tonight. I'm too tired.
- The correct answer is b) to go out. The sentence should be "I can't afford to go out tonight." The verb "afford" is usually followed by the infinitive form of the verb, without "to".

10. His mother made him the room.
- The correct answer is c) clean. The sentence should be "His mother made him clean the room." The verb "made" is followed by the base form of the verb, and it indicates that his mother forced him to do something.

11. Has it stopped yet?
- The correct answer is c) raining. The verb "stopped" is followed by the gerund form of the verb, which is "raining". It indicates the action that has potentially stopped.

12. Can you remind me some coffee?
- The correct answer is a) to buy. The sentence should be "Can you remind me to buy some coffee?" The verb "remind" is followed by the infinitive form of the verb, without "to".

13. Why do you keep me questions?
- The correct answer is c) asking. The verb "keep" is followed by the gerund form of the verb, which is "asking". It indicates the continuous action of asking questions.

14. I refuse his questions
- The correct answer is a) to answer. The sentence should be "I refuse to answer his questions." The verb "refuse" is followed by the infinitive form of the verb, without "to".

15. I've enjoyed them.
- The correct answer is b) meeting. The verb "enjoy" is followed by the gerund form of the verb, which is "meeting". It indicates the action that the speaker enjoyed.

16. The girl began at night.
- The correct answer is b) to cry. The sentence should be "The girl began to cry at night." The verb "began" is followed by the infinitive form of the verb, without "to".

17. He is against the discussion of this issue.
- The correct answer is c) postponing. The preposition "against" is followed by the gerund form of the verb, which is "postponing". It indicates the action that he opposes.

18. I can't stand here any longer.
- The correct answer is c) working. The verb "stand" is followed by the gerund form of the verb, which is "working". It indicates the activity that the speaker cannot tolerate.

19. They translated the story into English without a dictionary.
- The correct answer is c) using. The verb "translated" is followed by the gerund form of the verb, which is "using". It indicates the tool or method used for translation.

20. in that country all his life, he knew it very well.
- The correct answer is not provided. The sentence seems incomplete or contains a mistake. Please double-check the sentence and provide the correct options.