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1. What can we do ________ the Earth?
A.
help
B.
helping
C.
to help
【考点】
动词不定式;
【答案】
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单选题
普通
课时演练
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1. Many things make the Earth dirty. The Earth ________ sick.
A.
get
B.
gets
C.
got
单选题
普通
2. —What are the brown parts on the map of the Earth?
—They are ________.
A.
land
B.
forests
C.
oceans
单选题
普通
3. Smoke ________ cars and buses makes the air dirty.
A.
on
B.
in
C.
from
单选题
普通