21、What the boss really doubts is_         his employees will go on working in the company．

A．that              B．weather          C．when           D．whether

20、The policemen         the stolen place again and again，and finally they found the evidence who stole the antique．

A．got through           B．picked up          C．went over             D．turned over

19、—Can you tell me the timetable of the school bus?

—Well，the bus          here for the first trip at 6：30am．

A．will leave             B．left           C．is leaving                D．leaves

18、Was it at the school gate，if I may ask,           you met your friends from your hometown?

A．where            B．that             C．which              D．ones

17、—Why is your professor so happy recently?

—Because the theory she insisted on             correct．

A．is proved         B．proving            C．was proved            D．has proved

16、Besides hotels，there are also families         visitors can experience the warmth and kindness of the local people．

A．which           B．that        C．what            D．where

15、Lucy had to shout            on the noisy street．

A．making herself hear                           B．to make herself hear

C．making herself heard                          D．to make herself heard

14、Some children want to challenge themselves by learning a language different from    spoken by their parents at home．

A．what            B．that         C．which           D．one

13、           weather it is, we shall set out at 8o'clock．

A．Whatever             B．Whenever            C．However               D．No matter

12、—Why are you so sweaty?

__ I           football with my classmates and how I want to have a drink!

A．was playing           B．had been playing         C．have played           D．played