He was a young sailor on his first sea（）

单项选择题He likes to（）stamps as his hobby.

A.collect
B.raise
C.gather
D.pick

单项选择题He has（）come back from my holiday.

A.simply
B.only
C.just
D.even

单项选择题He took（）part in the activity.

A.an active
B.a dynamic
C.a positive
D.energetic

单项选择题The heavy rain（）the road.

A.hurt
B.injured
C.damaged
D.hazard

单项选择题He is not aware（）what he has done.

A.for
B.to
C.about
D.of