----- As we know, you won’t go back to the USA since you have established a research cente
答案:2 悬赏:40 手机版
解决时间 2021-04-11 23:01
- 提问者网友：ミ烙印ゝ
- 2021-04-10 22:40
----- As we know, you won’t go back to the USA since you have established a research center here．But how long in America?
----- For almost 10 years．
A. did you study
B. have you studied
C. were you studying
D. have you been studying
最佳答案
- 五星知识达人网友：孤独的牧羊人
- 2021-04-10 22:53
(答案→)A. did you studyB. have you studiedC. were you studyingD. have you been studying解析：可联系答.案.网客服索取。
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- 1楼网友：独钓一江月
- 2021-04-11 00:16
我学会了
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