China sent up the final satellite of Beidou Navigation satellite System （北斗卫星导航系统）from Xichang Satellite Center ______June 23，2020．（ ）
A．atB．inC．toD．on
Home is ___ place wherever you go．
Yes． There's no place like home．（ ）
A．warmB．warmer
C．warmestD．the warmest
What do you think of your junior high school life？
I think it is enjoyable， ___ I sometimes have some trouble in study．（ ）
A．ifB．thoughC．whileD．until
People now in many big cities have to ___ early to avoid the heavy traffic in the morning．（ ）
A．set outB．put outC．take outD．give out
You are talented young adults ___ are full of hope for the future．（ ）
A．whichB．whenC．whoD．where
___ convenient it is to live in China!
Yes， we've got WeChat， shared bikes， Alipay， etc．（ ）
A．What aB．WhatC．How aD．How