a. Sin mũ 4 x - cos mũ 4 x =1

b. Sin mũ 4 x + cos mũ 4 x = 1

1. we only eat there because the prices are so low (charge)

➜ if they ............low prices we wouldn't eat there

2. i won't eat any more cake because i'm full (put)

➜if i ................eat some more cake

3. if that noise doesn't stop soon i won't feel like eating. (put)

➜that noise will ..........it stops soon

4. i'll only leave the waiter some money if he's quick. (tip)

➜i won't ............he's quick

4. she wrote very fast and as a result made a lot of mistakes (slowly)

➜tf she ......................she wouldn't have made so many mistakes

5.owing to technical difficulties the phane was not able to take off.(able)

➜if there hadn't been technical difficulties, the plane ............take off

6. he hasn't got enough money now because he didn't save when he was working. (would)

➜if he had saved when he was......... money now

7. it's just as well you told me or i might have married him (you )

➜i might have married him ..........me

8. eating too much makes you fat (eat)

➜ if you ................you fat

9. we couldn't play tennis yesterday because of the rain. (rained)

➜if............................would've been able to play tenniss yesterday

10. if you don't get dressed right away we'll go without you. (put)

➜unless..................right away we'll go without you

1. BY PRESSING THE BUTTON YOU LOCK ALL THE DOORS ( press)

➜ALL THE DOORS.............................THE BUTTON

2. i didn't wake up on time because i didn't hear the alarm clock.(WOKEN)

➜ if i'd heard the alaem clock ..........................on time

3. the reason the dog bit him was that he was in our garden. (bittten)

the dog ............ if he hadn't been in our garden