------Could you please sweep the floor?
------___________. I am busy looking after my sister.
| A．Yes, sure | B．Sorry, I couldn’t |
| C．No problem | D．Sorry, I’m afraid not |
–Look! A man is cutting a tree on the moon.
--It ______ be true. The teacher said there is no air on the moon.
| A．can’t | B．may not | C．shouldn’t | D．mustn’t |
All of us went to the park ______ Bob. He had to look after his sister.
| A．besides | B．with | C．except | D．around |
I wonder when they ________ for Beijing. I will go to the train station to see them off when they _______.
| A．will leave; leave | B．leave; will leave | C．will go; leave | D．go; leave |
–Which would you like, tea or coffee? --_______. I really don’t mind.
| A．Either | B．Neither | C．Both | D．Any |
When the students were playing games on the playground, Jim suddenly stopped _____and began to cry, so we stopped _______ what was wrong with him.
| A．to play; seeing | B．playing; to see | C．playing; seeing | D．to play; to see |