很高兴为你解答.
保证正确率~!
正确答案是：A
【解析】：
even so 意思为“即便如此”,可以单独作让步状语从句,so 可以代指前面说的东西,就比如此题的：Your uncle seems to be a good driver.
而 even though 意思为“即便”,不能单独作让步状语从句,后面要加东西.
如：
Your uncle seems to be a good driver; 【even so】,I wouldn't dare to travel in his car.
= Even though 【your uncle seems to be a good driver】 , I wouldn't dare to travel in his car.
你的叔叔貌似是个好司机；即便如此,我也不敢搭他的车.
祝开心~!