The Bunsen Burner is so named because it is thought by Robert Bunsen.
A. to be invented
B. having been invented
C. invented
D. to have been invented
The Bunsen Burner is so named because it is thought by Robert Bunsen.A. to be inventedB.
答案:2 悬赏:50 手机版
解决时间 2021-01-04 09:11
- 提问者网友：溺爱和你
- 2021-01-03 22:34
最佳答案
- 五星知识达人网友：鸽屿
- 2021-01-03 23:26
A. to be inventedB. having been inventedC. invented(答案→)D. to have been invented解析：本句考查动词的被动语态和时态，it+is+动词ed形式，to do是固定的搭配用法。而Bunsen Burner的发明是过去发生的动作，所以用完成时态。
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- 1楼网友：西风乍起
- 2021-01-04 01:04
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