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【单选题】
There were dirty marks on her trousers ___ she had wiped her hands.

where
which
when
that
【单选题】
People at the party worried about him, because no one was aware ______ he had gone.

of where
of the place where
where
the place
【单选题】
But the Internet can bring some ________ effects, too. The most common one, some teenagers are addicted to computer games on the Internet.

negative
positive
important
excite
【单选题】
If Linda had practised hard enough last week,she______ more confident on the stage now.

would have been
had been
is
would be
【单选题】
During the Second World War, once before, the U-boats had been _____ because of air attack.

in trouble
in the trouble
for trouble
within trouble
【单选题】
After the Minister of Education had finished speaking at the press conference, he was made ______ all sorts of awkward questions.

answer
answering
answered
to answer
【单选题】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.

had been working; are still working
had worked; were still working
have worked; were still working
have worked; are still working
【单选题】
People at the party worried about him, because no one was aware____ he had gone.

of where
of the place where
where
the place
【单选题】
One-room schoolhouses can still be found in ___ areas where there are no other schools for many miles.

disposed
deserted
isolated
abandoned
【单选题】
The postage rate was high in the past, because post offices had to send many people to_________ the postage.

cover
carry
clean
collect