【题目】Over the past half century, ________ chemical fertilizers has become very common in farming.
A. having usedB. useC. used D. using
在线课程【答案】D
【解析】
试题分析：句意：在过去的半个世纪，在农业中使用化肥已经很普遍。此处是作主语，故用动词-ing形式，故选D。
查询谷 - www.chaxungu.com
最新文章
- 2026-04-27Over the past half century, chemical fertilizers has become very common in farming.A. having usedB.
- 2026-04-27 by the policeman, Ciara Judge gave some information.A. AskingB. AskedC. To be asked D. Ask
- 2026-04-27Great changes in China in the past 20 years.A.took placeB.have taken placeC.were taken placeD.have b
- 2026-04-27Who did the woman buy the shirt for?A.Herself.B.Her daughter.C.Her son.
- 2026-04-27 is going to do the job will be decided by the Party committee.A. That B. Why C. How D. Who
- 2026-04-27 we can't get seems better than we have.A. What, what B. What, thatC. That, that D. That, what
- 2026-04-27We'll do whatever we can you this term.A. to helpB. helpC. helping D. to be helped
- 2026-04-27Content with the salary offered by the foreign bank, he preferred the chances he could have at the s