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When Alice came to, she did not know how long she ________ there.（ ）

A. had been lying 　 B. has been lying　 　C. was lying　 　D. has lain

Mother asked the youngest kid____with his car.

A. what the matter　　　　　　　　　　 B. What was the matter

C. what the matter is　　　　　　　　　 D. what is the matter

Our government has taken some measures to solve the shortage of electricity, but it may take some time ________ we have enough power.

A．since　　　 B．after C．unless　　 D．before

—Who ________ it be that hasn't handed in his composition?

—It ________ be Robinson.He ________ it in yesterday.

A．can; will; should hand

B．can; must; should have handed

C．may; may; can't have handed

D．will; can; could have handed

Mary never does any reading in the evening,　　 .

A、so does John　　 B、John does too　　 C、John doesn’t too　　　 D、nor does John

She felt sorry that she had disturbed the ____ calmness of a man she respected.

A、regular B、curious C、usual　 D、various

Rich and generous, the young private entrepreneurs c _______ two billion dollars to the Red Cross at a time.

Some reporters _________ (采訪、v) the Prime Minister about the government policy just now.

1.      When filled with a gas lighter than air,a balloon can_____in the air. A.fly　 B.float　 C.wander　 D.sail