单项选择题
I don't want you to make any trouble,（）, I urge you to solve the problem.
A.thus B.consequently C.on the contrary D.just as
单项选择题 We have kept（）our friendship by writing to each other, so we are true friends.
单项选择题 We failed in our（）to climb the mountain.
单项选择题 If you want to learn something, you had better pay（）in class.
