The research they had been devoted to ______ to be of great value to the cancer patients.
#103621
A
is proved
B
proves
C
has proved
D
proved
推荐题目
After the flood, no house in the village ______,
#104206
A
left standing
B
was left to stand
C
was remained standing
D
remained standing
They are good friends and they many happiness and sorrows together.
#103949
A
had lived through
B
live through
C
lived through
D
have lived through
------Tom is never late for work. Why is he absent today?------ Something _______ to him.
#101563
A
must have happened
B
can have happened
C
must happen
D
can happen
The first time I ________ here, it was the year of 1980; this is the third time that I _________ to Chongqing.
#103130
A
came; had visited
B
had come; visited
C
came; have visited
D
had come; have visited
Had it been possible, I would have gone to attend Monica in the hospital, but I fully occupied last month.
#101704
A
had been
B
was
C
am
D
have been 过去相反，