This is _______ difficult problem that few students can work it out.
#39315
A
so
B
so a
C
such
D
such a
推荐题目
—Can you guess ______ the new schoolbag yesterday? —Sorry, I’ve no idea. 
#39168
A
how much did he pay for
B
how much he spent
C
how much he paid for
D
how much did he spend
----What did the teacher say? ----She asked            .
#37344
A
what was the matter with you
B
what were you doing
C
where you have gone
D
where you have been