题目

如图平行四边形ABCD中AB=AD=6，∠DAB=60度，F为AC上一点，E为AB中点，则EF+BF的最小值为         .                                       答案：       —________ they ________ tennis after school yesterday? — No, they didn’t.A. Did; play B. Do; playC. Do; played D. Did; played