题目

Sun Yang is great ________the field of swimming now.A. at B. inC. with D. on 答案：【答案】B【解析】句意：现在孙杨在游泳领域很出色。in the field of意为“在……领域”。 A. at在……；B. in在……里；C. with带有，具有；D. on在……上。这里是说在游泳的领域。故选B。It's already seven o'clock．Jack ________ be here at any moment． A．should           B．need            C．must               D．can