The changes of the plants and animals in an area ________ from differences in climate and the nature of the country

“Does anybody know the definition of Nerd”thehost seated in the front.

Beijing is cold this time _________. You need _______ warm clothes if you go there.

you study harder, you willcatchthe others in the class

There’s a ______in our office that when it’ssomebody’s birthday，theybring in a cake for us all to share．