It is a good example of a site that many people think to change.A. needB. to needC. needs

It is a good example of a site that many people think to change.

A. need
B. to need
C. needs
D. needing

A. needB. to need(答案→)C. needsD. needing解析：此题考查need的用法，还要理清句子结构。that前是个主句，that引导的是个定语从句，其先行词是a site，定语从句中谓语动词应该用单数needs，many people think是插入语，空格处是谓语部分。插入语经常被出题人放在题目中，使句子复杂化，增加句子的难度，做题时可以把插入语去掉，便于理解句子结构。need既可用作情态动词也可用作行为动词，主要用法如下：①作情态动词时表示“需要；必须”，后面当然跟动词原形，仅用于否定句或疑问句中，否定式是needn’t，在肯定句中一般用must, have to, ought to或should代替，如：You needn’t buy the book.—Need I finish the work today? —Yes, you must.② 作行为动词时，有时态、人称和数的变化，后面跟to do，否定形式要用don’t/doesn’t/didn’t need，如：He needs to finish it this evening.③ need用作行为动词时，后面还可以跟动名词或名词，此时含义跟need后面用不定式的含义不一样。“need +动名词”含有被动意义，类似这样的用法还有有want, require，如：Our classroom needs cleaning. = Our classroom needs to be cleaned. 既可用作情态动词也可用作行为动词的还有dare。

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