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 /; a the; / the; a