So quickly        is a possibility today may be a reality tomorrow.

A．are science and technology advancing that

B．science and technology advancing are that

C．are science and technology advancing that what

D．science and technology are advancing what that

我国植被的主要特点是（　　）

A．以森林为主

B．以沙漠为主

C．以荒山为主

D．以草原为主