— Must I come at four o’clock?
— Oh, no, you ____.
| A．don’t | B．mustn’t | C．don’t have to | D．can’t |
At that moment，he was last __________ the room with his friends．
| A．seen leaving | B．to see leave | C．seen to leaving | D．to see to leave |
Nobody knew who was the first ________ at school that morning when the window was broken.
| A．arriving | B．arrived | C．to arrive | D．have arrived |
——What’s wrong with your coat?
——Just now when I wanted to get off the bus, the man next to me _______ on it.
| A．is sitting | B．had sat | C．sits | D．was sitting |
Hurry up! The play _______ for ten minutes.
| A．has begun | B．had begun | C．has been on | D．began |
_________ little water is not enough for ________ many people.
| A．Such, so | B．So, so | C．Such, such | D．So, such |