_____ he promised that he wouldn’t be late，he didn’t arrive until the end of the party．
| A．Since | B．Although |
| C．Because | D．Until |
______ we have planned ahead might change when we put it into practice．
| A．Whatever | B．Whenever |
| C．Whoever | D．However |
_______ you talk to someone or write a message, you show your skills to others.
| A．At time | B．Some time |
| C．Every time | D．The time |
Try ________ she might, Sue couldn't get the door open.(2011·全国Ⅰ)
| A．if | B．when | C．sine | D．as |
The woman burst into tears ________she was announced the winner.
| A．that | B．instantly |
| C．unless | D．in case |
_______ you don’t have much experience in this field, why don’t you ask Professor
Wang for advice?
| A．Unless | B．In case |
| C．As long as | D．Now that |
The businessperson wanted to sell his goods fast: ______, he chose his partner with great care.
| A．and | B．otherwise |
| C．however | D．therefore |
Most probably it will be another 7 hours _____ you can have next meal, so each of you must have your stomach full.
| A．since | B．when | C．after | D．before |
___ regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
| A．It | B．As | C．Although | D．Unless |
____ I'm mistaken, I've seen that tall man at a party before.
| A．If | B．As |
| C．Unless | D．When |
It took me quite a long time to develop a voice, and _______ I have it, I am not going to be silent.
| A．now that | B．unless |
| C．so that | D．although |
How I wish we could study _________ there are fewer exams！
| A．which | B．that | C．when | D．where |
He hasn’t got any hobbies，_______ you call watching TV a hobby.
| A．when | B．if | C．unless | D．since |
“Only two centimeters higher, ______ break the world record,” encouraged the coach.
| A．or you will | B．you will |
| C．will you | D．and you will |
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