题目
- Boy， your head teacher has set up a WeChat group． Could you tell me ______？
- OK． I'll teach you． It's so easy．（ ）
- OK． I'll teach you． It's so easy．（ ）
A.
how I join it
B.
why he sets it up
C.
what it is used for
D.
when it was set up
知识点：Unit 1 The population of China is about 1.37 billion.章节：Module 9 Population