I. 选择填空(Multiple-choice)(共15小题;每小题1分,计15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。(Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the answer that best completes the sentence.)
31. Alice is fond of playing ________ piano while Harry is interested in listening to ________ music.
A. /; the B. /; a C. the; / D. the; a