–Has your father returned from Africa yet? –Yes, but he _____here for only three days before his company sent him to Australia.
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A
has been
B
will be
C
would be
D
was
推荐题目
.The moment I arrived there, I found all the food supplies had ______.
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A
used up
B
ran out of
C
given out
D
given away
Miss. Gao _______ in the library for three years. But now she is a teacher.
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A
worked
B
has worked
C
had worked
D
has been working
The watch ______ unnoticed for several days before I found it. 
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A
had laid
B
had lain
C
had been laying
D
had been laid