电池储能回馈电网:He is only 7years old .He can speak 3 languages,___

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He is only 7years old .He can speak 3 languages,___
Athough B.however
详细分析

B.however 用于句中句首或句末．
though常用于句首，

however
B

表转折

因为是2句分开的句子所以不能用连词
THOUGH 是连词引导让步状语从句
且用THOUGH 意思不对

A.though是尽管的意思
B.however是然而的意思
所以选择B!~

我来最详细的答案:
though放在句首可以表示尽管的意思,Though he is only 7years old .He can speak 3 languages.但是在句尾就必须用however表示转折的意思.所以选B.

although 用于句首,表示尽管,转折的意思,跟but意思相同.但是两者不能在同一个句子里出现.
however也是转折的意思,表示但是.however用于句首时要用逗号隔开.当然也可以象这样在句子的结尾用的,也要用逗号隔开.举个例子吧:
Although(Though)he is only 22 years old,he got married and had a son of one year old.
He is only 22 years old,but ~~~~~~~~~~~~~~~~~.
He is only 22 years old,however,he got~~~~~~~~~~~~.(He is only 22 years old, he got married and had a son of one year old,however.)

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