Perplexing sentences

1. “You ...................... take more exercise as it’s necessary for you” says the doctor.

1. needs to b. have to c. must d. needn’t

.2. ........................ that yellow tie as part of your work uniform?

1. a- Do you have to wear b. Must you wear c. Do you need wear d. Have you to wear

3. In the winter you ..................... use the air conditioner to cool the room.

a- needn’t to b. have to c. mustn’t d. don’t have to

4. You ............................ use the air conditioner in Dad’s room. He’s sick and shouldn’t get too cold

. a. needn’t to b. haven’t to c. mustn’t d. don’t have to

My answers:

1. c. must

2. a- Do you have to wear

3. d. don’t have to

4. c. mustn’t