【C19】A．on endB．on topC．in sessionD．in motion

【C14】A．On the contraryB．On the other handC．In additionD．At last

A．In a research institute.B．On the beach.C．In a zoo.D．On the campus.

A．At weekends.B．On weekdays.C．Late in the week.D．On Thursday.

_______ we won the war.A. In the endB. On the endC. By the endD. At the end

A．by contrastB．in practiceC．in particularD．on average

【C5】A．in honor ofB．on behalf ofC．in terms ofD．in conflict with