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Water, air and sunshine are __________great importance ____living things．
#48233
A
in; on
B
in; to
C
of; on
D
of; to
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Go to bed early and sleep well. You can work ________ tomorrow morning.
#46330
A
in high spirit
B
in low spirit
C
in low spirits
D
in high spirits 
Millie always has bread and milk __________breakfast.
#49603
A
for
B
on
C
to
D
in
He pushed his way ______ the crowd to the door.
#49247
A
through
B
across
C
in
D
over
The desk is ________ the way. Please carry it to an empty room.
#46505
A
in
B
on
C
to
D
by
China began to open to the outside world in the late 1970s. _________, there have been great changes in the country.                  
#46264
A
By then
B
As a result
C
At last
D
In all