Crazy English has over 20 million students all over China _____ the class through Internet.
#97088
A
attend
B
attended
C
attending
D
are attending
推荐题目
Rare species in the world, ______ by hundreds every year, must be jointly preserved by all countries, or humans will encounter ecological disaster in the near future.
#94233
A
disappeared
B
disappearing
C
disappear
D
having disappeared
Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases．
#88622
A
not handled
B
not being handled
C
not to be handled
D
not having been handled
They’ve made full preparations, but it remains ______whether they will be able to do a good job in the experiment.
#90623
A
to see
B
seen
C
being seen
D
to be seen
In April , thousands of holidaymakers remained ______ abroad due to the volcanic ash cloud.
#91192
A
sticking
B
stuck
C
to be stuck
D
to have stuck
—I really appreciate______ time to relax． —I don’t doubt ______ able to do so．
#96811
A
to have;you to be
B
having;that you being
C
to have;you are
D
having;that you are