题目内容：

It is a good idea to ask if you will be given homework and ___ your written work will be mark
为什么横线要填wether
It is a good idea to ask if you will be given homework and ___ your written work will be marked by a teacher who knows the level of English exam.

优质解答

因为作了ask这个动词的宾语从句,这个从句叫做间接疑问句,它在直接引语中就是一个一般疑问句,那么在间接引语中就需要用表“是否”的连词whether/if去引导它了；如果后面有or not的话,只能用whether.

追问：

后面没有 or not的,它是用and连接两个"是否"一个是if 一个是wether,我是不明白为什么第二个一定要用wether呢

追答：

第二个一定要用whether是为了避免重复，没有or not的话，第二个完全可以用if，但就充分、呆板了。

追问：

It is a good idea to ask if you will be given homework and ___ your written work will be marked by a teacher who knows the level of English exam. 整句话是这样子的

追答：

看到了。第二个可以用if，但就重复、呆板了；还是用whether和前面的if相比有新意。