在Excel2010工作表中,“A6:F12”表示( )
A6和F12单元格
B. A6或F12单元格
C. A6和F12单元格以及它们之间的所有单元格
D. 以上都不是
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They were abroad during the months when we were carrying out the investigation, or they _____ to our help.
A. would have come
B. could come
C. have come
D. had come
David has never been to Rome, but he talks about it as if he _____ there himself.
A. has been
B. had been
C. is
D. were
Tom was absent from the party. Otherwise, he _____ wonderful programs.
A. must perform
B. would perform
C. must have performed
D. would have performed
The new film directed by Steven Spielberg was very interesting. I wish I _____ it when it was first shown last Sunday.
A. saw
B. have seen
C. could see
D. had seen