How long did it take you _____ the classroom yesterday.
| A．to clean | B．clean | C．cleaning | D．Cleaned |
— ________ useful tool the computer is! — I agree. It’s ______ interesting as well.
| A．What a ; / | B．How a; the |
| C．What an; / | D．How an; the |
On Sundays, she prefers ________ at home alone ________ with her friends outside.
| A．stay; play | B．staying; to playing |
| C．staying; playing | D．to; to play |
Her father is a professor in________university in our city.
| A．不填 | B．an | C．a | D．the |
---I will buy you a new bike if you learn how to swim this summer.
---Is that a _______? I’m sure I’ll get the bike.
| A．chance | B．treat | C．trick | D．promise |
Bill Gates has donated millions of dollars to charities. He is really a(n)_____man.
| A．generous | B．outgoing | C．modest | D．active |