This also keeps the air，soil，water crops________ chemicals.
#25521
A
out of
B
out from
C
free of
D
rid of
推荐题目
Most Americans would prefer to keep their problems _____themselves, and solve their problems ______ themselves.
#28250
A
to; by
B
by; to
C
for; to
D
in; on
She’s aiming ______a sholarship; That is why she has been focusing her minds_____her work..
#29042
A
at; on
B
to; on
C
for ; in
D
at; into
I’d like to buy a house --- modern , comfortable and in a quiet neighborhood.
#26609
A
in all
B
above all
C
after all
D
at all
Wenchuan Earthquake Museum has been built_____the people who died in 5·12 earthquake last year.
#26922
A
in praise of
B
in need of
C
in memory of
D
in search of
I found the island a wonderful place for our experiments _______ the hot weather.
#28467
A
besides
B
except for
C
except
D
except that