专升本英语单选练习

    1、 It was nearly an hour ____the sleeping pill ______effect.

    A. when; took B. before; took C. since; had D. before ; had

    2、 Our TV sets sell well, but ten years ago no one could have imagined such a big share in the market that they ____.

    A. were having B. had had C. were to have D. had

    3、Bird flu , a contagious disease of animals , is believed _____ by viruses that normally infect only birds and less commonly pigs , and rarely humans .

    A．caused B．being caused C．to be caused D．to have caused

    4、He has got himself into a dangerous situation ______ he is likely to lose control over the plan.

    A. where B. which C. where D. why

    5、 ______, the concert began.

    A. The listeners having taken their seats B. Having taken their seats

    C. Having taken their places D. Taking their seats

    6、—You shouldn’t have gone there alone last night.

    — But I ______, because 西安ao Wang went there, too.

    A. didn’t B. had to C. did D. should

    7、 ---- There is a lot of smoke coming out of the teaching-building there.

    ---- Really? It _____ be a fire, most probably.

    A. can B. ought to C. have to D. must

    答案/解析

    1. B. It is+一段时间+before…表示“过了….才…”take effect 表示（药等）见效；（法规等）生效

    2. C十年前没有想到将来会占有这么大的市场份额 were to have

    3. C. 是由病毒造成的…

    4. C. Where he is likely to lose control…关系副词where 引导定语从句修饰situation境地。

    5. A. 独立主格做状语。主语concert 不可能执行take the seat 这一动作，必须加the listeners 做逻辑主语

    6.A. 表示过去的事实。

    7. B. ought to =should 表示可能性或相似性。例如；She ought to finish by next week.

    下星期她该完成了。The doctor said it will take six weeks and I should be fine by then.

部分内容来源于网络转载、学生投稿，如有侵权或对本站有任何意见、建议或者投诉，请联系邮箱（1296178999@qq.com）反馈。 未经本站授权，不得转载、摘编、复制或者建立镜像， 如有违反，本站将追究法律责任！