You _______ lose your way if you walk alone in the mountains at night.
A.may B.need C.can D.should
There _____lots of fish in this river, and birds catch ______for food.
A.are, them B.are, it C.is, it D.is , them
Mr. Green taught _______ English in our school and taught_______ French at home.
A.us, his B.him, us C.our, himself D.us, himself
—Have you decided ____ to do next? –Not yet.
A.what B.how C.where D.when
—Do you know Neil Armstrong? —Yes, he is the first man ____ on the moon.
A.walk B.walks C.to walk D.walked
The doctor did what he could __________ the dying man.
A.save B.to save C.saved D.saving
