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
推荐题目
—I'm not finished with my dinner yet.—But our friends ________ for us.(2010·北京)
#105317
A
will wait
B
wait
C
have waited
D
are waiting
The College Entrance Examination________near, so you should be prepared for it.
#105333
A
is drawing
B
draws
C
drew
D
has drawn
—Why don't we choose that road to save time?—The bridge to it ________.
#105308
A
has repaired
B
is repaired
C
is being repaired
D
will be repaired
--- Would you care for a cup of coffee? --- I ________ one. Thank you just the same.
#105330
A
had
B
have had
C
would have
D
will have