Have a care what you say ______ you may regeret.
A.or                B. and          C. however          but
A

試題分析：考查固定句型：祈使句+and/or + 簡(jiǎn)單句，句意：當(dāng)心你說(shuō)的話，否則你會(huì)后悔的。選A。
點(diǎn)評(píng)：固定句型的考查很簡(jiǎn)單，要清楚記住結(jié)構(gòu)和用法特點(diǎn)，還有變化形式，這個(gè)句型還可以變成：名詞+and/or+簡(jiǎn)單句。
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