Choose the best answer

21. _______ the eldest child, he works hard to help his parents support the family.

a. Be                                 b. Is                             c. To be                                  d. Being

22. She _______ trying to pass her driving test but fails every time.

a. kept                              b. is keeping             c. had kept                            d. keeps

23. I_______ complete silence now while I am trying this experiment.

a. am wanting               b. want                       c. did want                            d. have wanted

24. The students _______ by Mrs. Monty. However, this week they _______ by Mr. Tanzer.

a. are usually taught / are being taught    

b. usually teach / are teaching

c. have usually been taught / have been teaching d.        

d. were usually teaching / are teaching

25. My mother always the first  ______ up and the last____ __ to bed.

a. getting / going         b. to get / going      c.        getting / to go           d. to get / to go