______ we receive your application, we'll send you an e-mail to confirm it. (2013.6 A)
A. Once
B. Whatever
C. Whenever
D. However
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No sooner ______ than I realized I'd left the document at home. (2012.12. A)
A. have we sat down
B. had we sat down
C. we had sat down
D. we sat down
The play was so boring _______ I could hardly keep myself from falling asleep. (2014, 6. B)
A. that
B. which
C. what
D. whether
The decision about such a big project can not be made ____ each member of the board agrees.(2012,12,A)
A. if
B. unless
C. though
D. as
It is easy to get the software we need ____ the market is small. (2011.6. B)
A. as if
B. so that
C. although
D. until