There is no doubt _______ nearsightedness is a serious problem among the youth of our country.
#67052
A
/
B
which
C
whether
D
that
推荐题目
In his speech, Premier Wen Jiabao points out that creativity is ______it takes to keep a nation highly competitive .
#73059
A
how
B
what
C
which
D
that
Hidden _____ by a big tree, his house was not to be seen.
#72468
A
as it was
B
as it is
C
as it did
D
as he did