1. Silk _ one of the primary goods traded along the Silk Road by about 100 BC. A. had become B. have become C.becomes D. became2More efforts，as reported，_in the years ahead to accelerate the supplyside structural reform.A. make B. are madeC. have been made D.will be made3Dashan，who _ crosstalk，the Chinese comedic tradition，for decades，wants to mix it up with the Western standup tradition.A. has been learning B. had learnedC. is learning D. learned4. Jack _in the lab when the power cut occurred.A.worked B. is workingC. was working D. works5. Secret codes keep messages private.Banks，companies，and government agencies use secret codes in doing business，especially when information _ by computer.A.is sent B. has been sent C. is being sent D. will be sent6In the last few years, China _great achievements in environmental protection.A. made B. has madeC. have made D.would make7Jane cant attend the meeting at 3 oclock this afternoon because she _a class at that time.A. is teaching B. will teachC. was teaching D.will be teaching8. Despite the previous rounds of talks, no agreement _ so far by the two sides.A. reached B. was reachedC. has been reached D.will be reached9. To my delight, I_ from hundreds of applicants to attend the opening ceremony.A. am chosen B. was chosenC. had been chosen D.would be chosen10. They made up their minds that they_ a new house once Larry changed jobs.A.would buy B. buyC. bought D.will buy11. My family as well as I _ _ glad to see you. A. was B. is C. are D. am12. When and where this took place _ still unknown. A. has B. is C. were D. are13. I know that all _ getting on well with her. A. were B. are C. is D. was14. The rest of the novel _ very interesting. A. seem B. is C. are D. were15. The boy sitting by the window is the only one of the students who _ from the countryside in our school.A. was B. were C. is D. are16. There _ a knife and fork on the table.A. are B. is seeming to be C. seem to be D. seems to be17. Over 80 percent of the population _ _workers.A. will be B. are C. is D. was18. The whole class _ greatly moved at his words.A. is B. had C. were D. was19. I, who _ your good friend, will share your joys and sorrows. A. was B. are C. is D. am20. Between the two buildings _ a monument.A. is standing B. standing C. stands D. stand21. Laying eggs _ the ant queens full-time job. A. have B. has C. are D. is22. The number of the people who _ cars _ increasing.A. own.are B. ownis C. ownsis D. ownsare23. Every means _ been tried since then. A. has B. have C. are D. is24. It is not I but you who _the first to run to the goal in that competition. A. is B. was C. are D. is going to25. Chinese _ not so difficult to learn. The Chinese people _ brave and hard working.A. is; is B. are; is C. is; are D. are; are26.During the Mid-Autumn Festival, family members often gather together _a meal, admire the moon and enjoy moon cakes.A. share B. to share C. having shared D. shared27.Ordinary soap, _ correctly, can deal with bacteria effectively.A. used B. to use C. using D. use28.The hospital has recently obtained new medical equipment, _ more patients to be treated.A. being allowed B. allowing C. having allowed D. allowed29.Many Chinese brands, _ their reputations over centuries, are facing new challenges from the modern market.A. having developed B. being developed C. developed D. developing30.I didnt mean _anything but the ice cream looked so good that I couldnt help_ it.A. to eat；to try B. eating；tryingC. eating；to try D. to eat； trying31.I need a new passport so I will have to have my photographs_.A. taking B. takenC. being taken D. take32.Chinas image is improving steadily, with more countries_ its role in international affairs.A. recognizing B. being recognized C. to be recognized D. recognized33._ to think critically is an important skill todays children will need for the future.A. LearnB. Learned C. Learning D. Having learned34.The cooling wind swept through out bedroom windows, _ air conditioning unnecessary.A. making