4. Cats could fly if they (have)…………………. wings

5. If Lan (study)……………………… harder, she would get better mark.

6. If today (be)………………………….. a holiday, I would stay in bed all day.

III. Viết lại câu

1.      My brother doesn’t buy that car because he doesn’t have enough money.

•      If………………………………………………………………………………………………

2.      We don’t go out because it rains.

If…………………………………………………………………………………………………

3.      I don’t know his address, so I can’t contact him.

If…………………………………………………………………………………………………

4.      It’s  too cold so we can’t go swimming.

If………………………………………………………………………………………………

·         1. I didn't realize that Gary was in hospital. If I (know) ……………………… he was in hospital, I (go) ………………………………… to visit him.

·         2. Ken got to the station in time to catch his train. If he (miss) ………………………. it, he (be) ………………………………………. late for his interview.

3.A:

You look tired.

Well, if you (not wake) ……………………………… me up in the middle of the night, I (not be) …………........ tired.

4. Unfortunately, I didn't have my address book with me when I was in New York. If I(have)  ………………… your address, I (send) …………………………..……. you a postcard.

·         5. The accident was your fault. If you (drive) …………………….. more carefully, it (not happen) ……………………………

·          6. Last night Alex ruined his sweater when he washed it. If he (read) ………………………..the label, he (not wash) ………………………….. it in hot wate

7. The students (perform) ……………………….…… better if they (prepare) ……………………. more carefully, but they didn't.