39.（ ）

(单选题)It was the experience ______ he had at school ______ made hi (单选题)—May I help you? You seem to be in trouble.—______, thanks. (单选题)You’d better do exercise at least twice a week ______ you ca (单选题)Chinese culture ______ a particularly high value to the idea (单选题)Bill is always full of ideas, but ______ is useful to me. (单选题)Since we are here, let’s ______ some important work. (单选题)A sudden stop can be very dangerous, ______ if you are drivi (单选题)The doctor suggested her not ______ cold food these day. (单选题)I’ve got something ______ to tell you! I saw Chris Lee, the (单选题)You should make it a rule to leave things ______ you can fin