ⅰ.单项填空 1．all the characteristics that distinguish birds________other animals can be traced to prehistoric times. a．to b．between c．for d．from 答案： d 2．i failed in the final exam again；how i wish i________so much time playing computer games. a．haven’t spent b．didn’t spend c．hadn’t spent d．don’t spend 解析： 考查虚拟语气。根据failed in the final exam可以判断是对过去的虚拟，所以用过去完成时。答案： c 3．it is________of him to say such words. a．specific b．characteristic c．eager d．apparent 答案： b 4．it was not until dark________he found ________ he believed was the correct way to solve the problem. a．that；that b．that；what c．when；what d．when
