11、The government has launched(______) a massive campaign against crimes in the big cities.

A.Proposed

B.Decided

C.Begun

D.Studied

12、It is very considerate(_______) of you to remember my birthday.

A.Thoughtful

B.Considerable

C.Careful

D.Concerned

13、I was amazed(_______) at the beauty of the mountain when I reached the top.

A.Excited

B.Astonished

C.Happy

D.Shocked