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The chemicals in the vegetables and fruit are bad__________ our health．
#47801
A
from
B
with
C
of
D
for
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— It’s very kind           Betty to give us a hand.— That’s true. We should thank her           helping us out.
#46050
A
for; for
B
of; for
C
for; of
D
of; of
Teachers must be strict________ their students.
#47495
A
to
B
with
C
in
D
on
This sweater looks nice ________ Dick because he looks nice ________ blue.
#47204
A
in; in
B
in; on
C
on; on
D
on; in
 In spring, it is good for you to sleep ________your windows open.
#45891
A
for
B
to
C
with
D
about
There are many trees ____ our house.
#49785
A
in front of
B
in the front of
C
behind of
D
at the back