___ in the air,fuels give off heat.
___ in the air,fuels give off heat.
The sun _____ (give) off heat and light.
What happens to the heat given off by the land,water and air
which give off light and heat
We usually __ the heat before going to bed .A .give off B.tu
这句话对吗?Greenhouse gases keep heat in the air and make the ear
stuck in the heat
___ ,the workers continued their work in the open air.
The sun ___ light and heat ___
The ___ of oxygen in the air rises, and at last the air beco
give in;give 有没有give off和put off,
the air in the open air is very ___ many people like going t