北语《大学英语2》作业四

19春大学英语（二）作业_4 单选题1.The computer works fast,_data at the speed of light. A. having handled B. handling C. handled D. handles2._ receiving the gift, Einstein wrote a letter of thanks to the author immediately. A. While B. The moment C. Since D. On3.Many of us visited the industrial exhibition, _ , to our disappointment, we saw very few high-tech products. A. where B. which C. as D. that4.Not until all the fish died in the river, _ how serious the pollution was. A. did the villagers realize B. the villagers realized C. the villagers did realize D. didnt the villagers realize5.Not until I began to work _ how much time I had wasted. A. didnt realize B. did I realize C. I didnt realize D. I realized6.It is no use _ your past mistakes. A. regretting B. regret C. to regret D. regretted7.The teacher asked the students to learn the passage by heart, and they all _ . A. did so B. so did C. did that D. did such8.I have _the new method _my students and it is very effective. A. triedon B. triedout C. triedto D. triedat9.My mind went numb when I saw the gun pointing against the car window as we pulled out of the_. A. garbage B. house C. garden D. garage10.I could not persuade him to accept it,_make him see the importance of it. A. if only I could not B. no more than I could C. or I could not D. nor could I11.Mary _ my letter, otherwise she would have replied before now. A. should have received B. has received C. couldnt have received D. ought to have received12.Janes face suggested that she_ill,and her parents suggested that she_a medical examination. A. be.should have B. was.have C. should be.had D. was.has13.When _ where he was born, John said he was a New Yorker. A. asking B. was asked C. being asked D. ask14.Doing your homework is a sure way to improve your test scores, and this is especially true _ it comes to classroom tests. A. when B. since C. before D. after15._ is to attend our evening. A. both the singer and the dancer B. Either the singer or dancers C. The singer or dancers D. The singer and dancer16.I didnt manage to do it _ you explained now. A. until B. unless C. when D. as17.Consumers should do _than simply complain about the poor quality of goods. A. much less B. some more C. far less D. far more18.Though he worked very hard,he _unsuccessful after all. A. ended up B. turned up C. came up D. gave up19.As soon as they arrived in the town they went out to _. A. exploit B. expose C. explore D. scan20.I have a 70-year-old patient with a _ankle. A. fracture B. function C. farther D. funny21.When we got there, we found the work _. A. doing B. to do C. done D. to be done22.He _ me by two games to one. A. beat B. conquered C. gained D. won23.It is recommended that the project _ until all the preparations have been made. A. will not be started B. is not started C. is not to be started D. not be started24.You should bear in mind that he is not as strong as he _. A.