1 . ________ with teens who spend much of their free time in front of TV sets, those who are physically active often have better grades.

A．Compared

B．To compare

C．Comparing

D．Having compared

2 . Two percent of the total poulation of China have ____ access to the Internet, ____ with 45 percent in the USA and 15 percent in Japan.

A．an; compared

B．/; compared

C．an; comparing

D．/; comparing