He made a mistake, but then he corrected the situation ______it got worse.
| A．until | B．when | C．before | D．as |
You should understand the traffic rule by now. We have had it __________ often enough.
| A．explaining | B．to explain |
| C．explain | D．explained |
He is giving her French lessons in __________ for her teaching him English.
| A．place | B．turn |
| C．exchange | D．change |
-Shall I __________ addresses with you ？
-OK. Hongxing Road, No 53. Yours?
| A．exchange | B．share |
| C．cause | D．govern |
He's teaching me French __________ my teaching him Chinese.
| A．in place of | B．in case of |
| C．in exchange for | D．in honor of |
We have to give the users something new __________ what we've already offered, which is the only way to broaden the appeal of the website.
| A．in exchange for | B．regardless of |
| C．according to | D．in addition to |