Winters in ______ north of China are for_____ most part dry and cold.
My careless friend Bob received a ticket for speeding. He ____ have driven so fast.
The flu is believed ____by viruses that like to reproduce in the cells inside the human nose and throat.
Seeing her father come back, _________.
The old woman stood still with her eyes _________ the picture.
I can’t remember _____ made the teacher give Mary the permission to leave the class earlier.