题目

—What about _____ supper yesterday?—Well, _____ most delicious one indeed.A. /; the           B. /; a           C. the; the        D. the; a 答案：D从正方体的六个面中选取3个面,其中有2个面不相邻的选法共有A.8种B.12种C.16种D.20种