【C15】A．singerB．strangerC．waiterD．Frenchman

A．A Frenchman.B．A Portuguese.C．An English man.D．An American Indian.

【C15】A．causeB．courseC．cautionD．case

【C15】A．installmentB．expeditionC．analysisD．option

【C15】A．orB．andC．soD．then

【C15】A．whileB．afterC．beforeD．over

The dancer and ______ has arrived already.A、singerB、 a singerC、the singerD、singers