Everyone knows that _____ sun is in the center of the solar system（太阳系）

Would your younger brother go for a picnic this Sunday?—If I don’t go, _______.

Betty’s brother isn’t old enough to look after ____.

What do you think of the dish?－It looks _____ and it tastes _____ too.

Mr.Li, I can’t understand everything in class.——–Don’t worry ! I’ll _________ the main points at the end.