—Must we keep the window open all the time? A. No, you mustn’t B. No, you can’t. C. No, you don’t have to.
I get used to _______ early and going to bed early. It’s a good habit.
I don’t like learning math. Because it’s not so _______ as English.
—How much does the pen _____ you? —Ten yuan
He was so _______ after he knew the ________ news.
Japan lies _______ the east of China.