--- _____do you spell “ruler”?       --- R—U---L—E —R.

 — Would you like some coffee? — No, thanks. I           drink coffee. Coffee is bad for my stomach.

Be careful!. We must _____ play on the street. 

-- Is air the lightest thing in the world?-- Not            . Scientists from Zhejiang University have just developed the world’s lightest material.

My brother is good at drawing, but he doesn’t like exercising , I don’t,________.