单项选择题

Great as Newton was, many of his ideas today（）and are being modified by the work of scientists of our time.

A.are to challenge
B.may be challenged
C. have been challenged
D. are challenging

<上一题 目录 下一题>
热门 试题

填空题
What was the speaker doing at the fast-food restaurant（）
单项选择题
What’s the relationship between the two speakers（）

A. Student-teacher.
B. Doctor-patient.
C. Buyer-salesman.
D. Hairdresser-customer.
相关试题