—Why do you drink so much coffee?
—Well, _______ it doesn’t keep me awake in the night, I see no harm in it.
| A．because | B．as soon as | C．so long as | D．while |
—Someone wants you on the phone.
—_____nobody knows I am here.
| A．Although | B．And | C．But | D．So |
Try____ she might, Sue couldn’t get the door open.
| A．if | B．when | C．sine | D．as |
（2012全国新课程）I don't believe we've met before, I must say you do look familiar.
| A．therefore | B．although |
| C．since | D．unless |
I had hardly got to the office ______ my wife phoned me to go back home at once.
| A．when | B．than | C．until | D．after |
—Look at those clouds!
—Don’t worry. ______ it rains, we’ll still have a great time.
| A．Even if | B．As though | C．In case | D．If only |