1. will buy/ it doesn't cost

2. you run/ you will catch

3. sends/ will come

4. doesn't understand/ whisper

5. will cross/ fly

6. will answer/ is having

7. touch/ won't scream

8. will forget/ don't phone

9. will remember/ give

=> Tất cả đều dùng câu điều kiện loại 1

1 ....I will buy.... (I/buy) that machine if .....it doesn't cost...... (it/not/cost) too much

2 ....if you run.... (you/run) very fast,.you will catch.. (you/catch) the taxi

3 If she ..sends... (send) an invitation,her friend .....will come...... (come) to the party

4 He ....won't understand... (not/understand) you if you ....whisper..... (whisper)

5 You ....will cross.... (cross) thr Channel if you .....fly..... (fly) from Paris to London

6 Fred ....will answer..... (answer) the phone if his wife  .....has..... (have) a bath

7 If I ....touch.... (touch)this snake,my girlfriend ....will not to scream.....(not/to scream)

8 She .....will forget..... (forget) to pick you up if you ....won't phone...... (not/phone) her

9 I .....will remember....... (remember) you if you ......to give........ (to give) me a photo