Chia động từ trong ngoặc

Giải và giải thích giúp mình cảm ơn 
----- Nội dung dịch tự động từ ảnh -----
EXERCISE
1. I remembered... .
.... (shut) the windows.
2. Please remember ..
(lock) the door when I left but I forgot ... ...
3. I now regret....
4. I was very tired. I tried .....
couldn't.
(post) the letter.
(say) what I said. I shouldn't have said it.
... ..(keep) my eyes open but I
5. A: The photocopier doesn't seem to be working.
B: Try ..........(press) the green button.
6. I rang to the doorbell but there was no answer. Then I tried...
.......(knock) on the door, but there was still no answer.
.(take) more exercise.
7. I need.....
8. He needs ......
..(work) harder if he wants to make progress.
9. Have you ever watched people (try).............(catch) .
fish?
....
10. Suddenly everybody stopped....
11. Your hair needs (cut)........
12. Those workers stopped (drink).....
felt tired of their new work
-(talk).
....their coffee because they
13. He regrets(be)
14. We regret (inform)
suggestion.
-....lazy last year. He lost his job.
you that we cannot approve your