A new kind of drug to cure H7N9 bird flu by the scientists and they are hopeful that the

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解决时间 2021-03-30 05:58

提问者网友：wodetian
2021-03-30 02:23

A new kind of drug to cure H7N9 bird flu by the scientists and they are hopeful that they will succeed in a couple of weeks.
A. has been developed
B. is being developed
C. is developing
D. has developed

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五星知识达人网友：三千妖杀
2020-12-09 01:42

A. has been developed(答案→)B. is being developedC. is developingD. has developed解析：句意：一种新的药物正在被科学家开发来治疗H7N9禽流感，他们希望他们会在几个星期后成功。从they are hopeful that they will succeed in a couple of weeks. 可知是正在开发，而且drug和develop是被被动关系，选B。

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1楼网友：雾月
2021-02-19 14:28

收益了

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