What a mess! The sharing bikes are thrown everywhere．
Let's collect and put them in the right place_____they can be used conveniently．（ ）
A．unlessB．so thatC．becauseD．so long as
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
___ I swim here？
I'm sorry． Children ___ swim alone here． It's very dangerous．（ ）
A．Must； can'tB．May； must
C．Can； mustn'tD．Can't； can
I could ___ control my feelings at the moment． The song brought back so many childhood memories．（ ）
A．hardlyB．reallyC．clearlyD．nearly
Nick， I lost my pen and I couldn't find ___ anywhere．
There are many pens in that box． Just take ___．（ ）
A．it； itB．it； oneC．one； itD．one； one