Use past simple or past perfect.

1. when ron (arrive) at the airport he (discover) he (forget) her passport
2. after she visit the library she (buy some milk.
3. mary (open) her bag and (find) out that she (forget) her wallet.
4. he (get) home to find that somebody (break) into his house.
5. she (be) very pleased to see that mark (clean the kitchen.
6. when he arrive at the party he (learn) that den (just/leave).
7. he (feel) sick last night because he (eat) too many sweets
8. i(tidy) the flat, then i (sit) down and (have) a cup of tea.
9. when ron (open) the curtains he (see) that the ground (be) wet​

Объяснение:

1.When Ron arrived at the airport he discovered he had forgotten her passport

2. After she had visited the library she bought some milk

3. Mary opened her bag and found out that she had forgotten her wallet.

4. He got home to find out that somebody had broken into his house.

5. She was very pleased to see that Mark had cleaned the kitchen.

6. When he arrived at the party he learnt that Den had just left

7. He felt seek last night because he had eaten too many sweets.

8. I tidied the flat, then I sat down and had a cup of tea.

9. When Ron opened the curtains he saw that the ground had been wet.