表示“全神贯注”的常见短语还有：be lost in，be buried in，fix/focus one’s attention on，devote...to，concentrate one’s mind on，apply oneself/one’s mind to，be addicted to等。

　　[夯实基础]

　　(1)用absorb的适当形式填空

　　①When deeply absorbed in work，which he often was，he would forget all about eating or sleeping.

　　②He had an absorbed look on his face.

　　③—Where is Jimmy?

　　—Just now I saw him sitting under the tree，absorbed in his video games.

　　(2)He was so absorbed in TV that he forgot to sleep.

　　Absorbed in TV，he forgot to sleep. (用过去分词短语作状语改写句子)

　　3 exchange n.交换；互换giving and receiving；交流communication；兑换；v.调换；交换；交流communicate；兑换change

　　[应试指导]　写作高频词汇：(1)交换生 exchange students　(2)交流思想 exchange thoughts/ideas

　　exchange A for B 拿A换B

　　exchange sth.with sb.与某人交换某物

　　in exchange for变换；交换

　　in exchange作为交换

　　He exchanged a quick smile with her and then entered the lift.

　　他和她匆匆相视一笑，然后走进了电梯。

　　Knowledge exchange is never a one­way street.

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