根据下列句子及所给单词的首字母，在答题纸上按题号写出各单词的完全形式（每空限填一词）。

小题1:She saved your life at the r_______ of her own. In fact, she almost died.

小题2:Whenever I get into t________, my parents always help me out.

小题3:Mary has a sore throat and she c_______ last night. She should drink some tea with honey.

小题4:She has to put off s________ up a food bank to help the poor.

小题5:The leaves c_______ from green to yellow in autumn.

小题6:We t______ away lots of old things every day.

小题7:The small town has d_________ into a big city in the past ten years.

小题8:I’m too young so Mom always helps me f_______ the clothes.

小题9:Don’t c________ us with other girls. We are different from each other.

小题10:Chinese people aren’t used to k________ and forks when having western food.

从横切面看，蛔虫的消化道与体壁之间有一空腔，此腔为（）。

A、原体腔

B、血腔

C、次生体腔

D、真体腔