问[805]"a a"<winnie 70121@yahoo.com.cn>我是贵刊的忠实读者,请问:(一)有这样一道选择题:①There is nothing __. My brother can look after himself very well, because he's grown up. A)to worry about B)being worried C)to be worried D)to worry 正确答案是A),可我不知道C)项为什么不对?(二)还有这样两个句子:②There is no need to be worried.