题目

34．—You didn’t wait for Mr. Smith last night, did you?     —Yes, but we___________. He didn’t return home at all.        A．don’t have to           B．needn’t have            C．didn’t need to          D．should have 答案：B如图，已知：正方形ABCD边长为1，E、F、G、H分别为各边上的点，且AE=BF=CG=DH，设小正方形EFGH的面积为s，AE为x，则s关于x的函数图象大致是（ ）A．B．C．D．