单项选择题
—Have you been ______ any of your friends from college—No, I have been out of touch with them for several years.
单项选择题 Dick has never been on time, ______
单项选择题 Is this house the one ______ you once lived in your childhood
单项选择题 I'm still unable to make myself ______ in the discussion, which worries me a lot.
