请教高手英语语法问题~~表语从句~~~谢谢啦~~

Question

1.The problem is how/if we can master modern science and technology in a short time.
答案是how,为什么不选if
2. The question is if/whether we will have out sports meet.
答案是whether,为什么不选if
3. The reason why he has been such asuccess is that/where he never gives up.
答案是where，为啥不选that
4 You are saying that everyone should beequal, and this is what/where I disagree.
答案是where,为啥不选what

Answer 1

1.解释为“是否”时，if只能用于宾语从句，其他从句必须是whether.
2. 这是表语从句，所以只能是whether.解释为“是否”时，if只能用于宾语从句，其他从句必须是whether.

3. 亲，的确选that，因为he never gives up表达的是一种陈述，不是疑问。这个句子用where：He succeeded where other people failed .(where= in the field in which)

4 记住： this is where I disagree ==this is what I disagree with.this is where (== the point of view on which )I disagree

Answer 2

1,2两题的原因是：表语从句不用if,只用whether.
3.根据语境，"他如此成功的原因是永不放弃“陈述一个客观事实，故用that
4.where表示一个抽象含义”....的地方“， 如要选what，disagree后面需加with.
请你好好想想，仔细体味一下，有疑问再问。
祝你进步！追问

第3题的答案是where,何解？

追答

自己想

追问

应该是答案错了，，抱歉~~