--Don't be so disappointed.I’m sure that you can do better in the next exam. --Yes, but I ____ this time.
#89035
A
should be more careful
B
could be more careful
C
should have been more careful
D
must have been more carefully
推荐题目
— What has happened to Tom ? — I don''t know . He ____ lost . 
#89746
A
could get
B
might yet
C
can have got
D
may have got
The petrol tank is empty. I _________it up before we left home.
#86645
A
had to fill
B
would have filled
C
should have filled
D
could have filled