If you ___________your mind, please call me at this number before Saturday.(2017年12月第29题)
A. changed
B. would change
C. had changed
D. change
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__________you are a first time buyer or not, we will offer you a good price today.(2017年12月第33题)
A. Whatever
B. Whenever
C. Whether
D. However
Sales have shown some improvement _________we launched the new product last year.(2016年6月第29题)
A. until
B. unless
C. since
D. although
Big changes have taken place at the Marketing Department _________the new manager came.(2015年12月第30题)
A. before
B. after
C. since
D. while
He said he would continue to support us _________we didn't break the rules.(2015年12月第31题)
A. as well as
B. as soon as
C. as far as
D. as long as