The astronaut did many experiments in the spaceship, great help for knowing more about space.
#70039
A
which we think it is
B
which we think is of
C
of which we think is
D
we think which is of
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A brilliant idea occurred to him, ___ to his research in the lab.
#67725
A
while devoting
B
while devoting himself
C
while he was devoted
D
while devoted
__________satisfies the teacher is the naughty boy is making progress in all his subjects．
#70156
A
That; that
B
That; what
C
What; what
D
What; that
I felt very strange __________________.
#69425
A
when the first time I skied
B
for the first time I skied
C
the first time when I skied
D
when I skied for the first time