单项选择题
A.A shop assistant.B.A telephone operator.C.A waiter.D.A postal clerk.
A.The opportunity is too rare to pass over.B.He should line up for the program as others do.C.He should concentrate on his studies.D.He should consider going together with others.
A.In a bookstore.B.At a newsstand.C.In the library.D.In the classroom.