---Mary hasn't written to us for a long time.---What do you suppose __ to her?
#73595
A
happened
B
to happen
C
was happened
D
having happened
推荐题目
____ our mother will allow ____ to see a film after supper?
#69627
A
Who do you think; leaving
B
Who do you think; to leave
C
Do you think who; leaving
D
Do you think who; to leave
 Last year the well-known actress did _______ she ________ help the poor children in the mountain village.
#69873
A
what; could to
B
everything; could
C
all; could
D
that; could to
________ is where he gets all his money from. 
#69169
A
What I can’t understand it
B
That I can’t understand
C
What I can’t understand
D
Which I can’t understand it
_____ is known to us all is that America is a developed country _____ the First World.
#72465
A
Which; belonging to
B
as; belonging to 
C
what; belonging to
D
It; belonging to