Nowadays the price of mobile phones is on the average about ______ a dozen years ago.

Everything seems to be going ______ at the Shanghai Expo.

______ from the moon, the Earth looks like a blue ball.

Shelly would feel dizzy ______ she got on board a plane.

The secretary told us that the meeting ______ in Hawaii the following week had been cancelled.

Why do you think house prices keep ______ all the time in spite of all the new policies?

Unlike boys, most girls don’t like ______ with strangers in public places.

After the typhoon, the repairmen found that there were about 35 classrooms, ______ were broken.

Cong Fei has devoted more than he has to help hundreds of poor schoolchildren, ______ are college graduates now.

When asked why not ______ smoking for the treatment of his lung disease, he remained silent.