Although the causes of cancer ____we do not yet have any practical way to prevent it.
#105341
A
are being uncovered
B
have been uncovering
C
are uncovering
D
have uncovered
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
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
6.I have to go to work by taxi because my car ____at the garage.
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A
will be repaired
B
is repaired
C
is being repaired
D
has been repaired
5.---Have you handed in your schoolwork yet? ---Yes，I have. I guess it ____ now.
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A
has graded
B
is graded
C
is being graded
D
is grading
一Ready to give up guessing，Sandy?一No，no，hold on! I think I______ at the answer now．
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A
arrive
B
am arriving
C
have arrived
D
will arrive