句型转换,每空一词.

1. Some boys are runmng over there. (改为一般疑问句)

    _                boys _       over there?

2. They are looking at the pictures. (改为否定句)

    They ____ _       at the pictures.

3. The baby is crying in the next room. (就画线部分提问)

    _       _       the baby _      ?

4. It's snowy. (就画线部分提问)

    _       _       today?

5. I'm fine. (就画线部分提问)

    _       _       _      ?

依据国家标准规定，砌筑施工用机械造成的噪声限值：昼、夜间分别为( )。

A．60dB和45dB

B．65dB和50dB

C．70dB和55dB

D．75dB和55dB