He paid for a seat, when he ______ have entered free. 
#90561
A
could
B
would
C
must
D
need
推荐题目
I wish I        what to do.
#87823
A
new
B
ave known
C
now
D
ill know
--I'm told that John had another car accident this morning.--I believe not. He  _________so careless.
#90014
A
shouldn't have been
B
wouldn't have been
C
couldn't have been
D
mustn't have been
 Look! That fellow is too sleepy to work. He ______ up reading until midnight.
#88455
A
mustn’t stay
B
mustn’t have stayed
C
ought not to stay
D
should not have stayed