He knows that the commotion would frighten the cobra ________.

_______, he knows a lot about computer.

A、As he is a child

B、Child as is he

C、Child as he is

He has never seen the Greens and he knows ______about them.

A. little

B. a little

C. something

D. anything

A. accord

B. assist

C. confirm

D. comply

A.does he know

B.he knows

C.knows him

D.did he know

A.Knows，speak in

B.knows，speak

C.knows about，speak

D.knows about，speak in

He should () what he's good at, and no switch to something he knows nothing about.

A、take on

B、stick to

C、go after

D、live on