ItisthoughtthatonebillionpeopleItheworld,   ishalfthew...

问题详情：

 It is thought that one billion people I the world,     is half the word’s workers, earn their living by farming.

A. if    B. that    C. which   D. what

【回答】

B。句中“half the world’s workers”是对“one billion people in the world” 的补充说明， “that is”是 “that is to say”的省略说法，是*入语，that 并不是引导非限制*定语从句的，如果在 “that is”后加个逗号则更清楚，应选

B。

知识点：代词

题型：选择题