Professor James will give us a lecture on the Western culture, but when and where _______ yet.
#102946
A
hasn’t been decided
B
haven’t decided
C
isn’t being decided
D
aren’t decided
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______ of danger in the street at night, she had to go home, with a friend _____ her.
#101448
A
Warned ; accompanied
B
Warning; accompanying
C
Having warned; accompanied
D
Having been warned; accompanying
The fire was finally brought under control, but extensive damage _________. 
#99352
A
is caused
B
was causing
C
had caused
D
had been caused