_______ you are supposed to do is _______ it if you don’t like a thing. Don’t complain.

A. That; changeB. When; to changeC. What; changeD. What; changing

 

C

【解析】

試題分析：is前面的“_______ you are supposed to do”是主語(yǔ)部分，即主語(yǔ)從句，從句中的do后缺少賓語(yǔ)，用what引導(dǎo)，that在名詞性從句中無(wú)意義，when作狀語(yǔ)，排除A、B；當(dāng)前面有動(dòng)詞原形do時(shí)，后面的不定式通常省略符號(hào)to，故選C。

考點(diǎn)：考查主語(yǔ)從句

 

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