Jack     his pet dog every day. The dog must feel sad when he’s alone all day long.
#75030
A
should walking
B
should to walk
C
had better walk
D
had better to walk
推荐题目
 —Must I wait for you here?—No, you ______. 
#76623
A
don't
B
can't
C
mustn’t
D
needn’t
—Must I go there right now, mum?—No, you ____. You can go there tomorrow.
#75563
A
shouldn’t
B
can’t
C
mustn’t
D
needn’t
This pair of shoes ______ Li Gang’s .It’s too big for him .
#76442
A
can’t be
B
could be
C
might be
D
must be