________ you have learned should be made good use of ________ making mistakes in the coming college entrance exam.
| A．What; avoiding | B．That; avoiding |
| C．What; to avoid | D．That; to avoid |
Bring the flowers into a warm room ___ they'll soon open.
| A．or | B．and | C．but | D．for |
Find ways to praise your children often, ____ you’ll find they will open their hearts to you.
| A．till | B．or | C．and | D．but |
—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 |