Every solid object ______ reflect a sound，varying according to the size and nature of the object．
#87543
A
must
B
shall
C
will
D
should
推荐题目
You look very tired. You ____ late last night.
#87853
A
needn’t sit up
B
didn’t need to sit up
C
shouldn’t sit up
D
needn’t have sat up
But for your timely help, I ________ the project as scheduled.
#87395
A
couldn’t complete
B
couldn’t have finished
C
can’t have finished
D
can’t finish
It’s desired especially this year that this rule _______be brought to the attention of all the teachers.
#87489
A
should
B
would
C
might
D
could