1.I ___ work very hard because I have an exam next week. a)am having b) have to
c)has to. d)had to
2. When we were teenagers, we be home by nine o'clock.
a)had to. b)won't have to
c) have to. d)don't have to
3.You be millionaire to shop in Harrods. Everything is expensive there.
a)will have to.b)won't have to c) have to. d)don't have to
4.I phoned the plumber because I smell gas in the kitchen.
a)can. b) managed
b) could. d) couldn't
5.I phoned yesterday, but I ___ get an answer. Where were you?
a)can. b) managed to
c) could. d) couldn't
6.My grandfather speak four languages.
a)can. b) managed to
b)could. d) couldn't
7.I get into my house because I lost my key.
a)can't. b) managed to
b)could. d) couldn't

8.The neighbors were having a row, and
I ___ hear every word thay said.
a)can. b) managed to
c) could. d) couldn't
9.I skate I was five.
a)can. b) can't. c) could
10.What you do when you were seven?
a) could. b)can c) can't​

1. I have to work very hard because I have an exam next week. (b)
Explanation: The phrase "work very hard" indicates an obligation or requirement to do something, which is expressed by "have to."

2. When we were teenagers, we had to be home by nine o'clock. (a)
Explanation: The phrase "had to be" indicates that there was a rule or requirement to be home by a specific time in the past.

3. You have to be a millionaire to shop in Harrods. Everything is expensive there. (c)
Explanation: The phrase "have to be" indicates a requirement or necessity to be a certain way in order to perform an action or fulfill a condition, in this case, being a millionaire to shop in Harrods.

4. I phoned the plumber because I could smell gas in the kitchen. (c)
Explanation: The word "could" is used to express ability or possibility in the past, indicating that the person was able to smell gas in the kitchen.

5. I phoned yesterday, but I couldn't get an answer. Where were you? (d)
Explanation: The word "couldn't" indicates that the person was unable to get an answer when they called.

6. My grandfather could speak four languages. (b)
Explanation: The word "could" is used here to indicate past ability or capability.

7. I couldn't get into my house because I lost my key. (d)
Explanation: The word "couldn't" indicates inability to do something, in this case, get into the house due to the lost key.

8. The neighbors were having a row, and I could hear every word they said. (c)
Explanation: The word "could" indicates the ability to hear every word spoken by the neighbors during their argument.

9. I could skate when I was five. (c)
Explanation: The word "could" is used to express past ability, indicating the person's capability to skate at the age of five.

10. What could you do when you were seven? (a)
Explanation: The word "could" is used to express past ability or possibility, asking about what actions or skills the person was capable of at the age of seven.