问题详情:
It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months.
A. has been developed B. is being developed
C. is developing D. has developed
【回答】
B
知识点:现在进行时及其被动式
题型:选择题
问题详情:
It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months.
A. has been developed B. is being developed
C. is developing D. has developed
【回答】
B
知识点:现在进行时及其被动式
题型:选择题