I know the difference between these two words. So （　） they.

A:know B:will C:do D:does

The saying goes that ______ everything is to know nothing.

A:knowing B:know C:to know D:having known

(It is) (extremely) important (for) an engineer (to know) to use a computer.

A:It is B:extremely C:for D:know

I know the difference between these two words. So ______ they.

A:know B:will C:do D:does

The saying goes that ______ everything is to know nothing.

A:knowing B:know C:to know D:having known

I know the difference between these two words. So ______ they.

A:know B:will C:do D:does

(It is) (extremely) important (for) an engineer (to know) to use a computer.

A:It is B:extremely C:for D:know