大意是“汤姆开始学的是工程学,但由于爱好而改学英语”。Р switch to:change or shift; turn转变,转轨,改变Р 1. I used toР cook with electricity, but I’ve switched to gas.我曾经用电来烧饭,但我已改用煤气。Р 2. As he didn’tР like the TV program, he switched to another channel.因为他不喜欢这个电视节目,就转到另一个频道去了。Р 3.As the demandР for tape-recorder has fallen off, the factory has switched to the productionР of color TV sets.由于磁带录音机需求下降,工厂已改产彩色电视。Р(错误) РI teach because teaching is a profession _________ change.Р Рbuilding on Рbuilt on Рbuilding of Рbuilt of Р知识点:РChoice2Р学生答案:Р[A;]Р标准答案:РBР得分:Р[0]Р试题分值:Р5.0Р提示:Р解析:该题选B,题目大意是“我教书是因为教学是建立在‘变’这一基础上的职业”。Р build on:以…为基础;依赖;一心指望Р 1. You can buildР on his honesty. 你可以信赖他的诚实可靠。Р 2. They decidedР to build on that island.他们决定在那个岛上建造房子Р 3. The engine isР built on a new principle. 这种发动机是根据一种新的原理制造Р 出来的。