Maybe they are not in the library.(同义句转换)
They____in the library..
Dick is watching Tv now.(用sometimes改写句子)
Dick____ sometimes.
____ I believe chickens can swim.(改为否定句)
I                  chickens        swim.
____ They did it two days ago.(对划线部分提问)
                       they       it?
I eat junk food two or three times a week.( 对划线部分提问) 
____ do you eat junk food?
To sleep for eight hours every night is important.( 同义句转换)
____ to sleep eight hours every night.
____ You should eat some Chinese medicine.(改为否定句)
You          eat         Chinese medicine.
____ The boy didn’t stand up before the teacher came in.( 同义句转换)
The boy         stand up          the teacher came in.
she, what, doing, vacation, is, for, week, next?(连词成句)
____ ？

如图是草履虫的形态结构图，根据图回答：在内填号码，在横线上填相关内容．

（1）草履虫依靠________的摆动在水中旋转前进和取食．

（2）草履虫通过________进行呼吸．

（3）食物随着水流从________进入细胞，便在细胞内形成____ ____．

食物在其中消化，不能消化的食物残渣则由________排出体外．

（4）体内多余的水分和代谢废物排出体外需要哪些结构____．