19．_______ positive，and what's in your mind will happen．（　　）
A．To stayB．StayC．StayingD．Stayed

分析 保持樂觀，你頭腦里所想的就會實現(xiàn)．

解答 答案是B．考查固定句型：祈使句+and/or+句子，其中祈使句句首要用動詞原形．所以答案是B．

點評 解答此類問題，首先需要分析題干是否屬于固定句式，然后根據(jù)固定句式要求選擇正確答案．

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