I hear two high speed railways will be built in Xiangyang __________ a few years.—That sounds great. It’ll be more convenient and faster for us to go out.

Are you good at either math ________ physics?— I’m not good at math, ________ do I do well in physics.[ ]

On his way to the airport,it________him all of a sudden that he had forgotten his passport.[ ]

Zhang Xin，is there ________ university in the city—Yes. My good friend is studying in ________ university now.

When he walked_______ my desk，he knocked my books________ the floor.