根据句意和词首字母（汉语）提示完成单词。

1. The matter is rather s_____;you shouldn't always  laugh.

2. —What's_____（有毛病的）?  

    —I can't find my key.

3. He thinks his computer is out of_____,so he decides to buy a new one.

4. Helen doesn't want to help him,_____(也).

5. I  a_____ with my best friend yesterday.l want  say“sorry"  now.

6. What you said yesterday s_____me.

7. —My English is very poor.  

    —You could get a t_____to come to your  home.

下列调查：

①调查一批灯泡的使用寿命；

②调查全班同学的身高；

③③调查市场上某种食品的色素含量是否符合国家标准；

④企业招聘，对应聘人员进行面试．

其中符合用抽样调查的是（　　）

A．①②

B．①③

C．②④

D．②③