语音讲解：
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　　【对比句】

　　They were excited about the new gain. 他们为新收获而激动。

　　They were excited the new game. 他们为新游戏而激动。

　　【中心词解析】

　　gain：利润，相关短语：No gains without pains.(=No pains no gains.) [谚] 没有辛苦就没有收获; 不劳则无获。

　　game：游戏，常用短语;see through sb.'s game看穿某人的诡计,例句：The mother saw through the boy's game, and kept him in the house all day.那位母亲看穿了那个男孩的诡计，一整天都让他呆在家里。

　　【答案选项】

　　a. How much was it?

　　b. Did they invite it?