12. I＇m rather anxious ( ) her , for I haven＇t heard from her for a long time.

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解析：解析:nough 作为形容词放在可数复数名词和不可数名词前。解析:Have you got enough sandwiches for lunch?解析:Surely 15 minutes is enough time for you to have coffee.2、enough 作为代词。解析:Six bottles of wine will be enough.解析:I hope enough of you are prepared to help with the show.3、enough 作为副词,放在动词、形容词和其他副词的后面。解析:You don＇t practice enough at the piano.解析:Is the river deep enough for swimming (to swim in)?解析:She isn＇t good enough for the exam.

解析：解析:return sth.(to sb./sth.): 归还,放回解析:She returned the bird to its cages. 她把鸟放回笼子里解析:Please return me my 5 yuan/ return my five yuan to me.解析:Refer to sb./sth.: 提到,说到或涉及到某人(某事物)解析:When I said some people are stupid, I wasn＇t referring to you.解析:Don＇t refer to this matter again, please. 请不要再提这件事。解析:stick to sth.: 坚持或维持某事物”Would you like some wine?"“No, I＇ll stick to beer, thanks." 不,我还是喝啤酒吧。解析:turn to sb.(sth.): 向某人(某事物)寻求帮助解析:She has nobody she can turn to. 她求助无门。解析:The more depressed he got, the more he turned to drink.