题目

The serious drought(干旱) in Southwest China has made many people       without proper drinking water. A. live             B. to live              C. living               D. lived 答案：A如图，梯形ABCD中，AD∥BC，EF是梯形的中位线，对角线AC交EF于G，若BC =" 8" cm，EF =" 6" cm，则GF的长等于______________cm．