(2013·江西南昌一模)Why ________ it get colder when we climb up a mountain? We are getting nearer to the sun!
#86580
A
ought to
B
would
C
should
D
must
推荐题目
—What a pity! Their experiment is a failure.—They ________ better under more favorable conditions.
#86419
A
should have done
B
could have done
C
must have done
D
may have done
I couldn't have got to the meeting on time - _______ an earlier train . 
#90401
A
if I had not caught
B
unless I had caught
C
if I did not catch
D
unless I caught
The old lady insisted that her daughter ____ still alive and that she ____ at once. 
#87084
A
was; was operated
B
was; be operated
C
should be; should be operated
D
be; should be operated