Many gases        in the atmosphere actually        heat energy that escapes from the Earth’s surface back to the earth.

Yan' an, a city        in northern Shaanxi province, has seen great progress in its tourism industry over the past few years．

There was an oil painting _______ in the corner. It _______ there for several days.

__________ in the traffic jam, he was likely to be late for the job interview. 

The picture I took in the countryside ______ me of the time when I stayed there.