--- 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
– I am not interested in the story.
– _________
A. Neither am I. B. So am I. C. So I am.