Evdence has been found through years of study         children’s early sleeping problem are likely to continue when they grow up.
#68385
A
why
B
how
C
whether
D
that
推荐题目
If it _______tomorrow, I will go on a picnic.
#41302
A
will rain
B
rains
C
isn’t rain
D
doesn’t rain
_______ is the most useful invention?
#70076
A
Do you think which of these
B
Which of these do you think
C
Which of these you think
D
You think which of these
That is not the way ______I do it. 
#73835
A
/
B
which
C
for which
D
with which