按括号中的要求完成句子，每个空格填一个单词。

小题1:We will have a class meeting this afternoon.  (改为否定句)

We ___________ ___________ have a class meeting this afternoon.

小题2:He has learned to play the guitar for five years.  (对划线部分提问)

___________ ___________ has he learned to play the guitar ?

小题3:My pen pal asked me, “ Do you wear school uniforms to school every day?”

(改写句子，句意不变)

My pen pal asked me __________ I ____________ school uniforms to school every day.

小题4:It’s best to make a telephone call in a lower voice in public places. (改写句子，句意不变)

You’d better ___________ _____________ your voice when you talk on the phone in public places.

小题5:Divide the students into groups so that they can discuss the questions more easily.

(改写句子，句意不变)

If the students are ___________ into groups, it’ll be ___________ for them to discuss the questions.

不属于金属的物理性能的指标是（）。

A、密度

B、熔点

C、导热性

D、焊接性