Car _is the main reason for the city's pollution.
A. exhaust
B. use
C. exhausting
D. using
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This a house that seems out of _with its surroudings.
A. scale
B. relative
C. extent
D. small
She hopes to study _ at college
A. ecology
B. ecologying
C. ecologyed
D. ecologied
I hate to be a _,but could you help me.
A. nuisance
B. nuisancing
C. nuisanced
D. nuisancion
The plane is taking _ , please fasten your seat blet.
A. off
B. on
C. in
D. at