Professor Smith, along with his assistants, _____on the Project day and night to meet the deadline.
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A
work
B
working
C
is working
D
are working
推荐题目
E-mail, as well as the telephone, _____an important part in daily communication.
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A
is playing
B
have played
C
are playing
D
play
Small as it is，the ant is as much a creature as all other animals on the earth.
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A
are
B
is
C
have
D
do
More than one child _____to the cave to see the strange animal.
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A
have gone
B
are gone
C
has been
D
is been
Not far from the house ____ two gardens, ______ seated nearby playing bridge with his children．
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A
were; whose owner
B
was; of which the owner
C
were; its owner
D
was; owner of which