35．______the flight to Australia will be delayed is_____I’m especially worried about.

A．If ;what 　　　　　 　　　 B．Whether; that 　 　　　 C．When; that 　　 D．Whether; what

34．If only he_____himself and explained who he was then, of course I should have given him proper service.

A．had introduced 　　　　　　　 B．introduced

C．has introduced 　　　 　　　 D．have introduced

33．He had to be called two or three times_______ he would come to his dinner.

A．until 　　　　 　　　　　　　 B．unless 　　　　　　 　　　 C．before 　　　　　　 D．that

32．- _______the applicant wait outside the office?

-Yes, the manager is still on the phone.

A．Will 　　　　　　　 　　　 B．Shall 　　　　　　　　　　 　　　 C．Must 　　　　　　 　　　 D．Need

31．-Is Tom still not back?

-No. By next year he______from home for three years.

A．will leave 　　　　　　 B．will have been away C．leaves 　　 　D．has been away