1 . Some problems of living in the sea are similar to          of living in outer space.

A．those

B．this

C．these

D．that

2 . The games of the coming Paris Olympics are similar to ________ of 2008 Beijing Olympic games.

A．that

B．those

C．this

D．one

3 . I find ________ important for the whole class to keep ________ during the self-study classes.

A．that; silent	B．that; silence
C．it; silent	D．those; silence

5 . 让我们吃惊的是，那些德国人非常擅长烹制中餐。     
__________________________________________

6 . —Hello, who is ________?
—This is Basang speaking.

A．these

B．that

C．those

D．this

7 . Students who often ask questions during or after class can gain more knowledge than _______________ who seldom ask.

A．this

B．that

C．these

D．those

8 . _______________ girl in blue over there is my classmate Molly. We often do homework together.

A．These

B．This

C．Those

D．That

9 . I think the traffic in Hangzhou is even heavier than ________ in Xuancheng.

A．it

B．that

C．those

10 . You can buy the jacket online. It’s cheaper than ______ in the clothing store.

A．one

B．these

C．those