The students _______ their homework carefully when the teacher walked into the classroom quietly.

So David wants to sell the house and move to New York.— ______. He has found a job there.

填入下面文段空白处的词语，最恰当的一组是如今，我们对大自然的感应 ① 不如一棵树。一棵树 ② 知道什么时候抽芽、开花、结实、落叶等， ③ 把它的生命经验记录在一圈圈或松或紧的年轮中， ④ 我们呢有许多年轻的孩子甚至不知造玫瑰、杜鹃什么时候开花， ⑤ 不要说 ⑥ 声音的体验中体会秋天来临了。① ② ③ ④ ⑤ ⑥

It’s interesting _______by using the internet.

If you have______________, you can share it _________ your friends.