发动机引气的中压（IP)和高压（HP)分别来自发动机高压压气机的

It is required that you    （）        at six.

If he had not gone out in the storm （）          .

The boy acted     （）       he had never lived in Canada before.

He demanded that the laboratory report （）    immediately after the experiment was done.

He is not （）        a fool   （）     .

A steel plant is a place      （）   I am longing to visit these years.

Do you know who lives in the building   （）       there is a well.

She had three sons, all   （）       became doctors.

I, （） your good friend, will try my best to help you out.

Did she tell you anything （）        had happened to her?