21. After doing _____ series of exercises, he finally passed _____ driving test.

A. /£»the          B. a£»the             C. the£»a           D. /£»a

22. Many Chinese students speak English with a strong Chinese _____, but foreigners can understand what they say.

A. noise           B. voice            C. accent         D. sound

23. I’m new here. Could you tell me _____, please?

A. when the first bus arrives            B. when will the first bus arrive

C. when did the first bus arrive             D. when does the first bus arrive