Although the causes of cancer_____, we do not yet have any practical way to prevent it.
#104936
A
are being uncovered
B
have been uncovering
C
are uncovering
D
have uncovered
推荐题目
He devoted himself to action rather than talk, so his dream ______ in the end.
#99120
A
was become a reality
B
was come true
C
realized
D
was realized
— Sorry to have interrupted you. Please go on.—Where was I?— You _______ you didn’t like your father’s job.
#99395
A
had said
B
said
C
were saying
D
had been saying
The train_____at the present speed until it reaches Chicago at eleven o’clock tonight.
#99531
A
has gone
B
will be going
C
went
D
goes
(2014·济宁检测)—Why don’t we choose that road to save time?—The bridge to it________.
#99141
A
has repaired
B
is repaired
C
is being repaired
D
will be repaired
We wouldn’t have had to be in such a hurry if we had known the meeting .
#104540
A
was to put off
B
was to be put off
C
put off
D
had put off