It has been announced that candidates ______ remain in their seats until all the papers have been collected.  
#90276
A
can
B
will
C
may
D
shall
推荐题目
They enjoyed fresh watermelon last fall because they______ watermelon seeds in the spring. 
#87818
A
were planting
B
would plant
C
have planted
D
had planted
I’d rather you ________ there next week.  
#86429
A
went
B
go
C
should go
D
had gone
Bob said he was going to join our club but he didn’t. What a shame! He ______ his mind.
#87666
A
can’t have changed
B
mustn’t have changed
C
wouldn’t have changed
D
shouldn’t have changed