He has（）come back from my holiday.

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

单项选择题（）you involved in the traffic accident?

A.Have
B.Are
C.Do
D.Did

单项选择题Please write to me（）

A.as soon as youcan
B.as sooner as possible
C.as quick as possible
D.as quicker as possible