题目内容

___________ left before the deadline, I am afraid I can't finish the experiment on time.

Although such a short time
B. It is such a short time
C. With so short time
D. With such a short time

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We have to go to other places to find a crane, there ___________no crane here that stands idle.

A. is
B. to be
C. being
D. having been

As a pianist, he can hardly stand hearing a piano ___________so badly.

A. playing
B. being played
C. to play
D. having played

Geophysicists have collaborated with archaeologists and anthropologists to study the magnetic properties of pottery and fireplaces at sites ___________ by early humans.

A. occupied
B. occupying
C. which occupy
D. were occupied

During the course of its growth, a frog undergoes a true metamorphosis___________ with a fishlike larval stage.

A. begin
B. began
C. beginning
D. is begun

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