根据所给汉语注释或题干信患，在答题卷上标有题号的横线上，写出空缺处各单词的正确形

问题：

根据所给汉语注释或题干信患，在答题卷上标有题号的横线上，写出空缺处各单词的正确形式。每空只限一词。

小题1:He was wearing a very   (严肃的)expression and I knew something was wrong.

小题2:Everybody should   (积极)join in this charity to raise money for the poor.

小题3:It is my father's   （四十）birthday this weekend.

小题4:Nowadays the people's living conditions in the countryside have   （改善）a lot.

小题5:I felt the   (温暖)of my mother's arms around me.

小题6:My cousin was busy （回复）to his pen friend when I came to visit him.

小题7:Three plus three （等于）six

小题8:Every time you answer a question  ,you will get a point.

小题9:-Smoking does   to health. Please give it up, Dad!

-OK, I will. I cough a lot recently.

小题10:- Do you know how much the ring is  ？

-I have no idea, but I think you can afford it.