Mary has never been （)a ship.A、abroadB、aboardC、aboveD、absorb

（)they are doing has never been done before.A. ThatB. WhatC. WhyD. Whether

Mr. Bill has never been to China. As a result he knows little about this country.A．Because

"Tom has been to New York" entails______.A．Tom has been to AmericaB．Tom has never been to

（) they are doing has never been done before.

Mary looks unhappy because she has ______ by her classmates.A、laughedB、laughed atC、been

Mary has been a secretary in this company ______s