I was giving a talk to a large group of people, the same talk I ____ to half a dozen other groups.
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A
was giving
B
am giving
C
had given
D
have given
推荐题目
--- Why does the lake smell terrible?--- Because large quantities of water _________.
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A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
 Measures _______ to raise the employees’ salaries if the prices are rising all the time.
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A
had been taken
B
have been taken
C
will be taken
D
were taken