Tom took out a piece of paper he            and started reading in a clear tone.
#101495
A
was preparing
B
would prepare
C
have prepared
D
had prepared
推荐题目
Measures have been taken to prevent the accidents, but much _____ for more improvement.
#101771
A
remains to be done
B
is remained to do
C
remains to do
D
is remaining to be done
The house is dirty because it  since they moved out.
#100966
A
doesn’t clean
B
isn’t cleaned
C
hasn’t cleaned
D
hasn’t been cleaned