题目

下列命题中假命题是（） A . 平行四边形的对边相等 B . 等腰梯形的对角线相等 C . 菱形的对角线互相垂直 D . 矩形的对角线互相垂直 答案：D We are lucky to live in a rich country where we have many things. However, most of us usually ___ some things.Electricity is one thing _____we waste most. Lights, TVs, ____ and other things are often kept on even when no one is using them. We should turn them off when we do not need them. It ______ less than a second to do it. Anyhow, not wasting electricity save money, because we do not have to _____the electricity we do not use.The second thing that we often waste is water. Fresh water is precious , ____ it shouldn’t be wasted. It is only a simple matter of turning off a tap . I am sure ____ can do this easily if he wants to. ____ big waste is food. My mother_____ cook so much food that much of it was thrown away. I told her we had wasted so much ___ . She thought I was right and now cooks what we can eat.1.A.use B.wash C.waste D.forget .2.A.what B.that C.whose D.who3.A.radios B.apples C.bikes D.doors4.A.brings B.costs C.keeps D.takes5.A.afford B.save C.pay for D.care for6.A.though B.because C.so D.but7.A.nobody B.something C.everybody D.nothing8.A.Others B.Other C.Another D.The other9.A.planned to B.used to C.was able to D.was afraid to10.A.electricity B.water C.food D.money