You can't imagine _____ when they received these ice christmas presents请问空格里面填什么：A,how they were excited.B,how excited they were.选A还是B那为什么是A或者为什么是B而不是A解释谢谢.HOW哪个句子的宾语从句

You can't imagine _____ when they received these ice christmas presents请问空格里面填什么：A,how they were excited.B,how excited they were.选A还是B那为什么是A或者为什么是B而不是A解释谢谢.HOW哪个句子的宾语从句
You can't imagine _____ when they received these ice christmas presents
请问空格里面填什么：A,how they were excited.B,how excited they were.
选A还是B那为什么是A或者为什么是B而不是A解释谢谢.HOW哪个句子的宾语从句引导词?

You can't imagine _____ when they received these ice christmas presents请问空格里面填什么：A,how they were excited.B,how excited they were.选A还是B那为什么是A或者为什么是B而不是A解释谢谢.HOW哪个句子的宾语从句
B,这就是一个从句,不用变顺序
how + adj.+sb./sth + be
eg. How happy I am!
你都无法想象他们收到这些圣诞节礼物时是多么激动!