I _______ have been more than six years old when the accident happened.
#89803
A
shouldn’t
B
couldn’t
C
mustn’t
D
needn’t
推荐题目
It is often recommended that children ________chances to get close to nature.
#87722
A
are offered
B
be offered
C
should offer
D
must be offered
This cake is very sweet. You _____ a lot of sugar in it. 
#90559
A
should put
B
could have put
C
might put
D
must have put
The manager insisted that the work ____ finished by the end of this month. 
#87830
A
should be
B
will be
C
must be
D
ought to be