A.destruction
B.assessment
C.improvement
D.pollution

A.collect
B.gather
C.achieve
D.master

A.about
B.on
C.for
D.at

A.was playing
B.had played
C.played
D.is playing

A.result in
B.hold on
C.take over
D.keep to

A.is he
B.does he
C.isn't he
D.doesn't he

A.knowledgeably
B.knowledgeable
C.knowledge
D.know

A.light-hearted
B.big-hearted
C.warm-hearted
D.whole-hearted

A.As soon as it stops raining
B.After it had stopped raining
C.When it stopped rainingD. Once it stopped raining
D.

A.mood
B.luck
C.fortune
D.merit