Look at this! It’s broken now! You ________ have been careful!
#87928
A
could
B
must
C
would
D
should
推荐题目
      the teacher's advice yesterday, you __________in hospital now.
#87115
A
Were you to follow
B
Had you followed, wouldn’t be
C
Had you followed, wouldn’t have been
D
If you followed, wouldn’t have been
What would have happened____, as far as the river bank? 
#89939
A
if Bob has walked farther
B
if Bob should walk farther
C
had Bob walked farther
D
if Bob walked farther
I was really anxious about you. You _____ __ home without a word. 
#90288
A
mustn’t leave
B
shouldn’t have left
C
couldn’t have left
D
needn’t leave