Something ______ when they made a birthday card.
—Would you like camping with me?—I’d like to. But I’m busy my homework.
Most students like the teachers understand them well.
—It’s difficult to get to the other side of the river.—I think a bridge over the river.
Li Na is famous all the tennis fans in China know her.
More and more people have a low-C life and the air is getting much ___ than a few years ago.