The scientist corresponds with colleagues in order to learn about matters ______ to her own research.

(2014·河南南阳联考)Generally speaking，almost all the kids are________about how everything around them works.

Make sure that the machine is kept where it is not ____ to children.

I can't remember where I have put that book.Maybe they are ___ which one is not correct.

—What do you think of the good news?—Wonderful! It makes us _____．Most of us were _____about it