题目内容

There_____alotofrubbishonthefloorsoIaskedMarytosweep_____up.

A. were;it
B. are;them
C. was;it
D. is;them

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Threemilliontonsofcoal______everyyearinthecity.

A. isexploited
B. areexploited
C. hadexploited
D. haveexploited

Whatthechildreninthemountainvillageneed________goodbooks.

A. is
B. are
C. have
D. has

YouandI_____twinsisters.

A. were
B. are
C. is
D. am

Seventy-fivepercentoftheearth’ssurface______withwater.

A. iscovered
B. iscovering
C. werecovered
D. arecovered

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