—Lily dances so well . Where was she trained?—She learns all by herself .She _______goes to any training class.
More and more trees were cut down. _____, many animals are dying out.
We should often keep _____ touch with each other, because we are good friends.
—Do you think a radio is useful in learning English? —Sure. A radio can _____ listening English songs and reports.
—Do you know _____? —Sorry, I don’t know.
_____ the morning of December 1st, 2006, the 15th Asia Games _____ in Doha(多哈).