1-You...................clean the floor. It is not dirty.

2- She.....................go to the bank. She needed money.

3-It was raining. We.................stay at home.

4-You....................smoke at petrol stations. It is forbidden.

5-It's necessary for her to book a room in advance. She...............do so.

6-You.....................visit us and try my mother's food. It's delicious.

7- Does he....................attend the meeting?

8-................... you make noise during the conference? That's very annoying.

9-The teacher punished Mona as she....................her homework.

10-It was un-necessary for him to go out alone. He..............go out alone.

11-The salad was very salty. You..............................much salt to it.

12-It's advisable for her to study hard. She...................study hard.

13-Police men..................wear a uniform.

14-There is a speed limit. You ..........................exceed it.

15-This question is obligatory , so you ......................answer it.

16-It's necessary for you to answer these sentences. It is ..........................