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
Hearing the interesting story, all the people present_______.
#11291
A
burst into laughing
B
burst into laughter
C
burst out laugh
D
burst out laughter
Ten minutes had been made full ____ of ____ the problem.
#12597
A
using; studying
B
use; to study
C
to use; to study
D
use; studying
---Do you work in this office?---No, as a clerk in this office is on vacation, I’m just ____ here for about a week.
#13306
A
hanging out
B
working out
C
turning out
D
helping out
Do you agree to the idea ______ by the candidate at the meeting?
#13209
A
put forward
B
put up
C
put out
D
put into
The ________ of school leavers that go to university is about fifty percent.
#10966
A
degree
B
percentage
C
level
D
standard