【2015·天津】We need to get to the root of the problem______ we can solve it.
My grandfather is always thinking for others. In another word, he is always ________.
Driving on the road, drivers do ______ the traffic rules, which is responsible for themselvesas well as others.
—Won’t you go to the football tonight?—________.I might stay at home watching it live on TV instead.
—Please let me know where David is. I couldn’t find him anywhere.—Well, he _____have gone far—his coat’s still here.
-----What do you think of their marriage? -----_______ , if I were Kate, I wouldn’t marry him.