The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．
#69473
A
to which
B
with which
C
in which
D
for
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We haven't settled the question of ______ it is necessary for him to study abroad.
#73178
A
if
B
where
C
whether
D
that
You’d better make a mark ______ you have any questions.
#71971
A
at which
B
at where
C
the place
D
where
--- ________?--- Sorry. I don’t know.
#70653
A
Do you think what she likes best
B
What do you think she likes best
C
What do you think does she like best
D
Do you think what does she like best
"Why don’t you stay here over the weekend? " She said._______
#69819
A
She said why didn’t you stay there over the weekend.
B
She said why you don’t stay there over the weekend.
C
She asked me not to stay there over the weekend.
D
She suggested I should stay here over the weekend.