My sister( )dancing very much =He () () ()very much Please() () me soon 请尽快给我写信
He stands () () 他站在中间
hear from sb=get /receive a letter from sb
I () ()my pen friend yesterday 我昨天收到笔友的来信
=I () () () () my pen friend yesterday
have no time to reply to his letter = I have no time to () his letter