In China, people walk _________ the street.     
#50348
A
on the left
B
on the right of
C
in the middle of
D
on the left of
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I will work in Beijing ____ ten years.
#49802
A
at
B
for
C
after
D
in
Smoking will_______ your health.
#51060
A
be good for
B
good at
C
be bad for
D
bad at
Tom looks ________, for he hardly ever exercises ____ his free time.
#46422
A
unhealthy, in
B
unhealthy, on
C
healthy, in
D
healthy, for