单选题：What does“this’’refer to in the last sentence of Paragraph F

题目内容：

What does“this’’refer to in the last sentence of Paragraph Four? A．Screen unlock．
B．A password．
C．A cookie．
D．A tiny USB stick．

参考答案：

答案解析：

Had people received any training about who their Mr. /Mrs. R

Had people received any training about who their Mr. /Mrs. Right should be，the

分类：英语四级题型：单选题

分类：英语四级题型：单选题

听录音,回答题A．Enjoying strong feelings and emotions． B．Defying all dangers when they

分类：英语四级题型：单选题

The flow of exogenous river is influenced by different seasons and the water in

分类：英语四级题型：单选题

中华民族是由五十六个民族(nationalities)组成的大家庭。从遥远的古代起，我国各族人民就建立起了紧密的政治经济文化联系，并共同开发了祖国的大好河山，两

分类：英语四级题型：单选题