按要求完成下列各题，每空一词。

1. Mr Wang usually goes to work by bus. (写出同义句)

    Mr Wang usually _________ a bus to work.

2. The boy is so young that he can't walk. （写出同义句）

    The boy is _________ young _________ walk.

3. We watched a new movie last night. （就划线部分提问）

    _________ did you _________ last night?

4. Please pour the milk into the blender. (改为否定句)

    _________ pour the milk into the blender, please.

小儿时期最常见的心律失常类型是（）

A.病理性心动过速

B.期前收缩

C.房室传导阻滞

D.室上性心动过速

E.以上都不是