18．China’s new food law provides for a food recall (召回) system ________ producers have to stop production if their food isn’t up to standards.　　　

A．where　 　　　　　　　　 B．that　 　　　　　　　　　　 C．when　 　　　　　 　　　D．which

17.________ the website of the Fire Department in your city，and you will learn a lot about firefighting.　　　　　　　　　　　　　　　　 　　　　　　　　

A．Having searched　 　B．To search　　　　　　　　 C．Searching　 　　 　　　D．Search

16．________ is reported in the newspapers, talks between the two countries are making progress.

A．It 　　　　　　　B．As　 　　　　　　　　　　　 C．That 　　　　　　　 　　 　　　D．What

15．Many girl students in the village have dropped out of school in China，________ the government is always taking measures to offer the chances of being educated.

A．in spite of that 　　　　　　　　　　　　　　　　　　　　 B．because of which　　

C．on account which 　　　　　 　　　　　　　　　　　　　　 D．in addition to that

14．-Mum，can I go out to play football with Jessica?

-No，you can’t ________ your homework is being done.

A．before　 　　　　　 　　B．until　 　　　　　　　　　 C．when 　　　　　　　　　　 　D．as

13．The growing speed of a plant is influenced by a number of factors，________ are beyond our control.　　　　　　　　　　　　　　　 　　　　　　　　　　

A．most of them　 　　　 　　B．most of which　　 C．most of what　　　　　 　 　D．most of that

12．I saw a woman running toward me in the dark. Before I could recognize who she was，she had run back in the direction ________ she had come.

A．of which　 　　　 　　B．by which　　　　　　　　 C．in which 　　　　 　　　　D．from which

11．-Where did you get to know her?

-It was on the farm ________ we worked.

A．that　 　　　　　　 　　B．there 　　　　　　　　　　 C．which　 　　　　　　　　 　　D．where

10．________professional violinist practices for several hours a day, but ________ violinist has his own way of playing the Beethoven concert.　　　　　　　　

A．Each；every 　　　B．Every；each　　　 C．One；a　 　　　　　　D．All；each

9．Shortly after the accident, two________ police were sent to the spot to keep order.

A．dozens of　 　　 　　B．dozens　　　　　　　　　　 C．dozen of 　　　　　　　 　　D．dozen