---Why didn’t you reared him of the possible danger?---But what       otherwise? He never listens to me.
#86877
A
could I do
B
could I have done
C
should I do
D
must I have done
推荐题目
Your advice was a great help to us, without which all our efforts       .
#87386
A
wouldn’t pay off
B
hadn’t paid off
C
wouldn’t have paid off
D
didn’t pay off
___________, he would have been fired. 
#88131
A
Had he lied to the boss
B
Did he lie to the boss
C
If he has lied to the boss
D
If he lies to the boss
If you want to borrow a football after school, your student card ___ here.
#89045
A
has to leave
B
must leave
C
has to be left
D
must be left