According to the recent research, heavy coffee drinking and heart attack is not necessarily ______ and effect.

Be quiet, the head teacher Mr. Gu is coming.— Don’t worry. It _____ be him. Mr. Gu is much fatter.

I don’t like the color of this sweater. Would you please show me __ one?— Here you are.

Do you know how to ____ this word in English?

Captain America(美国队长) is such _______ wonderful science fiction movie that I want to see it _______ second time.