The railway was opened______traffic_______ April 4, 1985.
I was wondering what to do with my car which won’t start ______ a kind man offered to help.
---Why does Peter look upset?--- He is a newcomer to the class and is having difficulty ______ by his classmates.
Her question was so difficult that I could hardly make any _______ of it at all.
Human beings are different from animals _____ they can use language as a tool to communicate.
The house prices fell sharply at the end of last year, but ______ at the beginning of this year.