單項(xiàng)選擇題Our lab was being（）when we visited the university.

A.rebuilt
B.rebuild
C.rebuilding
D.to rebuild


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1.單項(xiàng)選擇題Everything（）if Albert hadn't called the fire brigade.

A.will be destroyed
B.will have been destroyed
C.would be destroyed
D.would have been destroyed

2.單項(xiàng)選擇題If the man（）succeed，he must work as hard as he can.

A.will
B.is to
C.is going to
D.should

3.單項(xiàng)選擇題If he was fitter, he（）live longer.

A.–（不填）
B.will
C.would
D.can

4.單項(xiàng)選擇題If there were life on Mars, such life forms（）unable to survive on earth

A.is
B.are
C.would be
D.will be

5.單項(xiàng)選擇題He is over fifty, but he looks as though he（）only in his thirties.

A.were
B.is
C.will be
D.has been