这些句式你掌握了吗？按要求改写下列句子。

1. They're playing basketball. (就画线部分提问)

_______ _________they doing?

2.Is she making a cake? (做否定回答)

______ ,she ______.

3.My mother keeps the table clean.(改为一般过去时)

My mother ______ the table clean.

4.Can you tell me how I can get to the station?(改写句子,句意不变)

Can you tell me how__________ to the station?

5.Kate has to clean the house every day. (就画线部分提问)

______ _____ Kate _____ to _____ every day?

新生儿头颅B超、CT、MRI检查各有何利弊？