问题补充：
--My girls! You are too shy. You should have more confidence in .
-- Ok, thanks.
A. you
B. yourself
C. yourselves
D. themselves
答案：
A. you
B. yourself
(答案→)C. yourselves
D. themselves
解析：句意：我的姑娘们！你们太害羞了，你们应对自己更自信。哦，谢谢。 you你，yourself 你自己， yourselves你们自己，themselves他们自己。have confidence in对……自信；根据my girls可知主语为you你们，可知in后为你们自己，故选C.
