8.Customers are asked to make sure that they ____ the right change before leaving the shop.
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A
will give
B
have been given
C
have given
D
will be given
推荐题目
In China, farmers are ______ from the central government’s new policies on agriculture.
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A
suffering
B
profiting
C
earning
D
learning
--- Why are you so angry?--- Jack failed to return my tennis bat on time again. He _______his words.
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A
is always eating
B
has always eaten
C
always eat
D
always ate
______, your composition is full of mistakes.
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A
Writing carelessly
B
Written carelessly
C
Having written carelessly
D
Being written carelessly
—What are you putting your shoes on again for?—Because I________you home, that’s all!
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A
drive
B
am driving
C
have driven
D
drove
7.Although the causes of cancer ____， we do not yet have any practical way to prevent it.
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A
are being uncovered
B
have been uncovering
C
are uncovering
D
have uncovered