Food safety is important. Rules _____ to stop people from food pollution.
| A．must make | B．must be made |
| C．can make | D．can be made |
The colour of this book is similar to ________ of mine.
| A．it | B．one | C．that | D．this |
It is not wise ________ teenagers to be crazy about stars. It is more important _____ them to learn more about Chinese culture.
| A．for; for | B．of; for |
| C．of; of | D．for; of |
It is wrong of a student ______ his homework by himself. Copying makes one lazy.
| A．to do | B．don’t do |
| C．not do | D．not to do |
I like using QQ to make ______ easier for friends to contact with each other.
| A．it | B．that | C．this | D．them |
She was veryus for informing her of her son’s safe return.
| A．grateful to | B．grateful for |
| C．grateful | D．grateful with |