Bring the plants into a warm room ________ they will grow quickly.
A.or
B.and
C.but
D.for
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B解析试题分析：考查固定句式。固定句式：祈使句+连词+陈述句=If条件句，主句。本句Bring the plants into a warm room, and they will grow quickly.=If you bring the plants into a warm room, they will grow quickly. A项用于否定句中。故B正确。考点：考查固定句式点评：本题特别重要。固定句式：祈使句+连词+陈述句=If条件句，主句。还可以进一步转换成名词短语，+连词+陈述句的形式。