Which of these do you think is ____ useful invention? [ ]A. the more B. the second more C. most D. t

题目简介

Which of these do you think is ____ useful invention? [ ]A. the more B. the second more C. most D. t

题目详情

Which of these do you think is ____ useful invention?

[     ]

A. the more
B. the second more
C. most
D. the second most
题型:单选题难度:中档来源:专项题

答案

D

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