--Excuse me, can I have this seat, please?
--I’m sorry, but it’s_______.
| A．used | B．sat | C．taken | D．gotten |
--- Is Mr. Smith in his office now?
--- No, he there. I saw him in the library a minute ago.
| A．may be | B．must be |
| C．can’t be | D．won’t be |
--- Nancy, apple on the table is for you.
--- Thanks. An apple a day keeps the doctor away.
| A．a | B．an | C．the | D．/ |
_______ you study harder, you’ll fall behind others.
A. If B. Unless C. Until
She _______ the computer since 2001.
A. has had B. has bought C. had
In the past 10 years, great changes ___________ place in Beijing.
A. took B. have taken C. have took