题目
题型:同步题难度:来源:
our time.
B. have been challenged
C.have questioned
D. have been questioning
答案
核心考点
试题【Creat as Newton was, many of his ideas today and are being modified by th】;主要考察你对被动语态等知识点的理解。[详细]
举一反三
A.has completed
B.have completed
C.have been completed
D.has been completed
B. haven"t decided
C. isn"t being decided
D. aren"t decided
B. have been marked
C. had marked
D. had been marked
B. were held
C. had been held
D. have been held
B. had been discovered
C. has discovered
D. has been discovered
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