The next day, the group of villagers had not gone very far ____ they entered a very narrow passage between two mountains.
This is a very interesting book. I’ll buy it,__.
The two biologists debated ____each other for years ______ the origin of species. A. with; about B. about; for C. between; over C. to; for
John rushed out in a hurry, ___________ the door ____________.
Mrs. Brown was much disappointed to see the washing machine she had______went wrong again.
---What is our earth like ________from the moon? ---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".