如图，已知，点B是线段AC上一点，点M、N分别为线段AB与BC的中点，若AC=10cm，则MN=__

they're in love,where am i 的歌词,The Weepies的 In the future,scientists can develop plants that can grow on Mars(同义句)In the future,scientists wil_____ ______ ______ develop plants_____ on Mars. My first love ,do you remember me I would like to know I don‘tknow whether A will he give back the book B he gives back the book C he will givebacktheboo Whether one can succeed depends on how hard one works解释一下本句语法, She likes the determination it takes to do the sport. 她比班上大部分孩子外向 she 's ( )( ) than ( )( ) the kids in her class 有关时间的词语 not until 和until 到底该什么时候用?比如You should begin to eat until every comes.和You shouldn't begin to eat until every comes.意思应该一样吧?如果一样怎么,一个加not一个不加,到底该什么时候加?如果不一样, 分析下列句子的语法现象(1)给千人廪,布三千匹.（ ）（2）言于睿曰.（ ） 请分析下面句子的结构和主要的语法现象Writing down a couple of good ideas does not a great script make.加一句，高中语法是解决不了的。 Whether he can go or not depends on his parents' wishes.请问这句话里面的whether可以不要吗?不要的话对句意有什么影响? How much one enjoys himself travelling depends largely on who/whom he goes with,whether hisfriends or relatives.请问这里who/whom引导的是定从还是宾从?为什么? Whether to go or not depends on you?翻译下 Whether he can go to America or not depends on the amount of money he can have.这句话错在哪?怎么改呢?求高人~@ it ----(get) colder and colder outside 既然说sports of bag 那hot dog 可以说成hot of dog吗 They each has a bag for sports.哪里错了为什么? They each has a bag for sports.(改错) They each has a bag for sports 错在哪里 a bag of ( )可以填写什么? what did mrs.Edwards ask What do Mr Huang and Mrs Huang do?写出它的 同义句 what does mrs wu do? What does Mrs Whits do?的同意句 中东地区目前的形势怎样? .had…… before造句 谁能用before造句?我很急 用过去式的before造句×5个 用before...now...造句 what can I do for himHe knows I like him and I know he likes me too.At school,he always sends me some sweets or a piece of juice.When I eat the snacks he gives me,I feel happy.But sometimes,I will feek worried,becaues I don't know what I can do for h What am I do for him