请根据要求改写下列句子，每空一词。
小题1:Coaches came into use in 1958. (对划线部分提问)
__________ __________ coaches come into use?
小题2:He is so energetic that he can be our leader. (改为简单句)
He is energetic __________ __________ be our leader.
小题3:“Have you finished the report?” I asked him. (改为间接引语)
I asked him __________ __________ had finished the report.
小题4:Mike, you mustn’t show off before others when you have success. (改为祈使句)
Mike, __________ __________ off before others when you have success.
小题5:He often writes the words “best wishes” at the end of his letters. (改为被动语态)
The words “best wishes” __________ often __________ by him at the end of his letters.
小题1:When did
小题2:enough to
小题3:if/whether he
小题4:don’t show
小题5:are, written
题目分析：小题1:对于询问时间用when开头，再根据句意看，时间应该为一般过去时，用did帮忙，故为When did
小题2:enough修饰形容词放在形容词或是副词的后面，后接不定式，表示足够…做某事，故为enough to
小题3:我问他是否已经完成了这个报告。if 意为是否，引导宾语从句，后面用过去的相应时态用过去完成时，故为if/whether he
小题4:麦克，当你成功时不要在别人面前炫耀自己的自己的成功。祈使句用don’t加动词原形构成，故为don’t show
小题5:本句用被动形式，一般现在时的被动形式为is/are+过去分词，本句中用are written.
点评：本题不难，全在于平时基础知识的掌握情况。对于平时的学习要多积累，对于词义及动词时态和语态要特别注意，平时的学习时对课文的内容多背诵，形成较好的语感。