下述哪项符合Ⅱ度Ⅱ型窦房阻滞的心电图特征（）。

A.P－P间期不等

B.长的P－P间期与短的P－P间期之间有成倍数的关系

C.窦性P－P间期逐渐延长，最后发生房性期前收缩脱漏

D.长的P－P间期与短的P－P间期之间不成倍数的关系

E.窦性P－P间期逐渐缩短，最后发生房性期前收缩脱漏

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.