Why not ____ your teacher for help when you can’t finish _____ the story by yourself

The famous writer is going to talk about the European countries and people he has visited in the past two months.

Lots of rescue workers were working around the clock, _____ supplies to Yushu, Qinghai Province after the earthquake. [ ]

_______ it comes to Chinese films, we first think of the famous director Zhang Yimou

The young man invited the lady to dance with him, but she ______ his invitation．