Up to now, no one has come up with a（n） explanation of why dinosaurs died out, and it remains a mystery．
#11239
A
astonishing
B
amusing
C
convincing
D
puzzling
推荐题目
The latest major disaster that occurred in Zhejiang paralyzed traffic, caused blackouts and ______ water supplies for days.
#12783
A
cut down
B
cut off
C
cut up
D
cut out
As a member of one world, each of us has a role _____ to make the earth a better place.
#13748
A
playing
B
play
C
played
D
to play
Death toll from Typhoon Haiyan in the Philippines _______ 3,637, after the strongest storm this year destroyed the central part of the country on Nov. 8, 2013.
#11231
A
rose to
B
arose from
C
rose from
D
raised to
What ________ will it make whether Mr. Black tells us the story early or not?
#13041
A
sense
B
mistake
C
difference
D
use