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

_____has Mr. Clinton been a member of Greener China since he ____ to China？A、How soon

The meeting _____when Mr. Wang _____to school.A、has begun; getB、has been on; getC、had b

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

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

"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.