1 . Because of the cold weather, the students in Heilongjiang have a longer winter holiday than ________ in Guangdong.

A．it

B．one

C．that

D．those

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

A．those

B．this

C．these

D．that

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

A．that

B．those

C．this

D．one

4 . The gravity on Mars is only about three-eighths of _________ on the Earth.

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

A．These

B．This

C．Those

D．That

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

A．one

B．these

C．those

7 . Things made by hand are usually more expensive than ________ produced in factories.

A．these

B．that

C．those

D．this

8 . The cars made in China are cheaper than ________ made in Japan.

A．that

B．them

C．those

9 . As for learning English, students ________ read a lot do much better than ________ who don’t.

A．who; that

B．which; those

C．that; those

D．whom; that

10 . You know the trains now are more convenient than t________ in the past.