客服

购物车

APP下载

扫码下载事考帮APP

回顶部

搜题
APP下载

扫码下载事考帮APP

单选题 10. “The thirst for knowledge is the strongest ________ there is a barrier,” says the president of the Italian Union of the Blind.

A

which

B

unless

C

since

D

where

正确答案 :D