【C5】A．OnB．WithC．ForD．By

Some people have become concerned _____ another kind of pollution.A、aboutB、withC、forD、by

He got so little money that his family had to live（)welfare money.A onB inC forD by

【23】A．ofB．withC．forD．in

【C7】A．byB．withC．forD．from

【C3】A．onB．withC．underD．for

【C5】A．ofB．withC．forD．to