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题型：单选题
“I can't remember where I have put the books. Maybe they are ________.” which one is not correct?
- A.
missed
- B.
lost
- C.
gone
- D.
missing
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题型：单选题
After the accident, the police ________ to help the injured people.
- A.
called up
- B.
called on
- C.
were called in
- D.
were called out
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题型：单选题
________ the time he was ten, he had learned many poems.
- A.
As
- B.
By
- C.
In
- D.
At
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题型：单选题
Helen ________ go on the trip with us but she isn’t quite sure yet．
- A.
shall
- B.
must
- C.
may
- D.
can
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题型：单选题
________，he works just as hard as everyone else．
- A.
Because he is weak
- B.
Weak as he is
- C.
Though weak he is
- D.
As he is weak
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题型：单选题
The cost of one day in the hospital can run as ________ as 500 dollars．
- A.
lower
- B.
much
- C.
expensive
- D.
high
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题型：单选题
________ you've understood all these rules，you'll have no further difficulty．
- A.
Unless
- B.
Once
- C.
Although
- D.
Until
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题型：单选题
________ we got on the bus，it started to move．
- A.
Short after
- B.
Before long
- C.
Soon after
- D.
After a while
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题型：单选题
He was doing his homework ________ he saw the teacher passing by his window．
- A.
while
- B.
when
- C.
as
- D.
which
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题型：单选题
Fire safety in family houses，________ most fire deaths occur，is difficult to achieve．
- A.
why
- B.
where
- C.
how
- D.
when
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