You should be _______ careful when you take the chemistry exam.—I agree. In this way, I will make _______ mistakes.

Sandy wants to buy the same football cards_____ his brother did. [ ]

I don’t know where to go this summer vacation.——Why not_____visiting Huanggang?There are many places of interest there.

Haven’t seen Lucy recently. What’s happened?—Oh, it’s more than two months ______ she worked here.

How could you be so rude as to walk in here in the middle of my class?—_____________