Our PE teacher was very busy.He said his job -- the sports m

questionbear小姐
我认为此处的 C 是正确的 是动词不定式作表语的用法
不定式作表语表示具体动作或将来动作；动名词作表语表示抽象的一般行为.
①To be kind to the enemy is to be cruel to the people.
②My chief purpose is to point out the difficulties ofthe matter.
③What I would suggest is to put off the meeting.
当主语和表语都是不定式时,其含义一是条件,一是结果（例①）.当主语是aim,duty,hope,idea,mista ke,plan,purpose,suggestion等为中心词的名词词组（例②）时,或以what引导的名词性分句（例③）,不定 式说明主语的内容.
④Our work is serving the people.
⑤What he likes is taking a walk after supper.
⑥The story told by Mr.Wang is interesting.
④⑤句动名词作表语,与主语部分可以转换,如Serving thepeople is our work,而⑥句中是现在分词作 表语,说明主语的性质、状态,现在分词具有形容词的各种特征,另外,动名词作表语还应与进行时态区别开 来.
be in charge of 通常是”管理”之意,有主动意味,主语常是人,比如：
He was left in charge of the shop while the manager was away.
经理不在的时候,由他管理这个店．
be in the charge of 表”负责”之意,有被动的意味,in还可以用under代替,比如：
These patients are in(under) the charge of Dr.Wilson.
这些病人是威尔逊医生负责治疗的．
请多指教