It was stupid ____ him for help. Everyone knows that he is very mean.
There are more than fifty ________ in our school.
Lucy is ________ university student.She likes playing ________ piano.
This year the number of the US students ____in China has increased by 18.4percent compared to last year.
You had better encourage your children to____some of their pocket money for future education .
The price of oil is increasing so rapidly. Indeed ! The oil prices____by 10 and 20 percent so far.