Boy, your head teacher has set up a WeChat group. Could you tell me ______?
OK. I'll teach you. It's so easy. ( )
A.how I join itB.why he sets it up
C.what it is used forD.when it was set up
Boy, your head teacher has set up a WeChat group. Could you tell me ______?
OK. I'll teach you. It's so easy. ( )
A.how I join itB.why he sets it up
C.what it is used forD.when it was set up