24．Can you tell me __________ you are going to do next week?

A．if                 B．what         C．how                D．where 

23．They waited and waited for something _________ to happen.

A．excite                  B．excited        C．exciting              D．to excite

22．---- Could you please tell Jim that I will call him later?

---- Sure. I’ll tell him when he __________.

A．comes                B．came           C．has come            D．will come

21．The number of students who _____________ the English club ______20.

A．take part in, is      B．join, are       C．take part in, are           D．join, is