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
Last Sunday, Mr. Green asked Lily    she had written to her mother    .
#79204
A
that; yesterday
B
that; the day before
C
whether; yesterday
D
whether; the day before
This is the hotel _______last month. 
#37126
A
which they stayed
B
at that they stayed
C
where they stayed at
D
where they stayed
—Did the radio say ________?—Yes, from Hunan.
#37842
A
how the bad rice came
B
where the bad rice came from
C
how did the bad rice come
D
where did the bad rice come from