题目
题型:上海高考真题难度:来源:
A. discovered
B. have discovered
C. had been discovered
D. have been discovered
答案
核心考点
试题【With the help of high technology, more and more new substances _____ in the past】;主要考察你对被动语态等知识点的理解。[详细]
举一反三
B. will change
C. was changed
D. has been changed
A. have run
B. have been run
C. had been run
D. will run
A. treated
B. have treated
C. had been treated
D. have been treated
— I know. It _____ for weeks.
A. hasn"t cleaned
B. didn"t clean
C. wasn"t cleaned
D. hasn"t been cleaned
[ ]
B. isn"t being decided
C. hasn"t been decided
D. haven"t been decided
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