The little fat professor is very popular with his students because he is good at ________ different

teaching methods to make his class lively and interesting. [      ]

A. performing

B. replacing  

C. employing    

D. containing

根据下面提示语要求造句。某中学为帮助贫困山区的失学儿童重返课堂，要在全校开展一次献爱心捐款、捐物活动。请你为这次活动拟两条校园宣传标语。（要求：①运用对联，平仄不论；②有文采，并体现人文关怀；③每条不少于10个字）

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