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
--Where have you been? --I_____in the heavy traffic. Otherwise I_____ here earlier.
#89616
A
got stuck; would have come
B
got stuck; was
C
have got stuck; would have come
D
had got stuck; would come
We were strongly recommended that we _____ in Malaysia. 
#86432
A
didn’t travel
B
wouldn’t travel
C
hadn’t travelled
D
not travel