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We can get fresh water from rain, from rivers, or from ________ the ground.
#50757
A
across
B
under
C
over
D
off
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— The doctor is busy ________ his work.
#48117
A
at
B
for
C
with
D
on
Liu Xiang was born       Shanghai       July 13, 1983.
#48736
A
on; in
B
in; on
C
in; in
D
on; on
You really don’t have to worry ________ your weight. You look just right.
#49368
A
for
B
from
C
with
D
about
---Good news! A new educational CD-ROM has just come out!---Great! I’d like to study and play_______________.
#49563
A
at times
B
in time
C
on time
D
at the same time
My friend works ___ a hospital ___ a doctor.
#49209
A
at, in
B
from , as
C
in, as
D
on ,as