题目

 ---Oh, must you? Stay a bit longer. It’s been such fun having you.---______, but I’ve got an early start tomorrow morning.A. No problem      B. All right       C. Thanks anyway    D. Never mind 答案：C.如图，将△ABC水平向右平移1cm到△DEF，若CE=2cm，则BF=（　　）A．3cmB．4cmC．5cmD．不能确定