A. must have gained B. can have gained

　　　　C. could have gained D. must gain

　　　　21. If you keep quiet and read your book, child, you _____ have my promise_____ I will buy you a box of chocolates.

　　　　A. are going to; that B. will; which

　　　　C. shall; that D. are to; which

　　　　22. What the doctor is uncertain about is _____ my mother will recover from the serious disease soon.

　　　　A. when B. how C. whether D. why

　　　　23. ----I hear Johnson was badly injured in the accident.

　　　　---- ________, lets go and see him.

　　　　A. If not B. If so C. If necessary D. If possible

　　　　24. Not far from the club there was a garden, ____ owner seated in it playing bridge with his children every afternoon.

　　　　A. whose B. its C. which D. that

　　　　25. ----You went late ____ the stadium yesterday evening, didnt you?

　　　　----Yes, my wife was a little late _____ the supper.

　　　　A. to; with B. for; with C. for; for D. at; for

　　　　26. ----How can you _______ that he is from the North?

　　　　----Simply by his accent.

　　　　A. get to know B. say C. realize D. tell

　　　　27. ----Now that you like the portable personal computer so much, why not buy one? It is of great use to your work.

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