1.Who's the first man ______ the Moon?

1.Who's the first man ______ the Moon?
A.land on B.to land C.landed D.to land on
2.You look worried.____________?
A.What did you do B.What has happened
C.How is everything D.Why is that
3.—I can't imagine being a soldier in the army.
—I agree.____________________.
A.I don't want to be a soldier.
B.I bet I can imagine.
C.You have to be so brave.
D.You can't be a soldier.