–You speak English well.Who teaches you?--Nobody.I learn it by _________.
—May I speak to Miss Wang?—Sorry. She isn’t in. She __________ to Hong Kong.
—Look! There is a big river. Let’s swim in it!—No, I think it’s _________ dangerous.
—___________ do you play computer games every week? —About two hours.
—Would you mind turning _______ the music? Your father is sleeping.—Sorry. I’ll do it right away.
As we’re students, we __________ obey the school rules.