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(   ) 1. Chickens are ______ smaller than cows.

A. much                B. more                 C. little                 D. many

(   ) 2. —What are you doing?

—I’m thinking ______ life in the countryside.

A. for                   B. over                  C. with                  D. about

(   ) 3. Insects feed ______ plants.

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