The collapse of the World Trade Centre  has put US economy in a difficult  ___________.
#4935
A
occasion
B
case
C
situation 
D
background
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—Tom came back home the day before yesterday.— Really? Where __________ at all?
#4818
A
had he been
B
has he been
C
had he gone
D
has he gone
— What can I do for you, sir?— I want _____.
#4597
A
a dollar’s worth of candy
B
candy a dollar’s worth
C
a dollar worth of candy
D
a dollar-worth candy
He must have attended the meeting yesterday, ___he?
#4556
A
didn’t
B
mustn’t
C
needn’t
D
hadn’t