see to ____the children don't catch cold.a.it what b.it that

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see to ____the children don't catch cold.a.it what b.it that c.what d.that
应该选哪一个选项,为什么,
还有一题也帮咱看看吧
he,______is playing an important part is well known to us all.
a.that who b.those who c.who that d.who

第一题选b,因为see to it that是个固定搭配,意思是坚持,确保,整个句子的意思是确保不让孩子感冒,第二题选d,先分清句子成分,找出基本的主语,谓语,宾语,很明显,he是主语,在这整个句子中,你看到了2个系动词,即2个is,其中一个就是谓语,一个句子中只能有一个谓语,he后有逗号分开,后面可以看出是个非限定性定语从句,即who is playing an important part就是定语成分,若不要定语（即在划分句子成分时可以把其去掉）,那么整个句子就是he is well known to us.主谓宾都有了,是个完整的句子,所以选d

see to ____the children don't catch cold.a.it what b.it that Children don't always know____.A.what to do it B.how to do i 缺词填空：A：Mum,I don't know what to wear today?B:It's cold o____ It's important that the children __ lies.A.don't tell B.didn What a lovely dress!Why don't you _______ it _______ to see I think it great to see documentaries.A./;isn't B.don't;isn' I really don`t know_____ A.what to do it B.how to do C.what i don't want any more trouble,you see?A there being B it to I don't know ( ).A.what to do it B.how to do it C.what to do It is easy for many people to catch a cold I don't know___.A.what to do it B.what do C.have to do it D. I don't know ______.A what to do with it B what to do it wit