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
推荐题目
The College Entrance Examination________near, so you should be prepared for it.
#105333
A
is drawing
B
draws
C
drew
D
has drawn
一Have you handed in your schoolwork yet?一Yes,I have.I guess it _____ now.
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A
has graded
B
is graded
C
is being graded
D
is grading
—What's that noise?—Oh，I forgot to tell you.The new machine ________.
#105313
A
was tested
B
will be tested
C
is being tested
D
has been tested
My money ________.I must go to the bank to draw some of my savings outbefore I've none in hand.
#105320
A
has run out
B
is running out
C
has been run out
D
is being run out
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