-- What time do you expect me back, Mum?
-- Say, ______half an hour.
| A．at | B．before | C．in | D．for |
The woman asked the policeman ______.
A. where the post office is B. where the post office was C. where was the post office
—You’d better not eat too much salt. It’s bad for your health.—________.
A. Not at all B. Thanks for your advice C. It doesn’t matter
You will fall behind others _________ you work hard.
A. if B. when C. unless
—Have you decided where to go for your summer vacation?
—Not __________. We may go to Qingdao.
A. ever B. already C. yet
______ the teachers’ help, I have done well in all my subjects.
A. With B. Under C. For