Many people attended the meeting, some of ______ were businessmen．
A．them B．that C．whom D．which
They gave a most wonderful performance , ______ people will never forget．
A．it B．that C．one D．what
I don’t smoke now, but I ______ for almost ten years．
A．ever smoked B．have ever smoked
C．had ever smoked D．was ever smoking
As taxpayers, they felt that they could no longer tolerate ___ a say in the government．
A．not to have B．not having C．having not D．to have not
Clean water is ______ necessary than fresh air to [\people living in big cities．
A．no more B．not more C．no less D．not less
When a giraffe（长颈鹿） has ______ drink, it has to stand with its front legs wide open apart in order to reach ______ water．
A．/; / B．a; the C．the; / D．/ ; the
