He looks very tired because he           well last night.

I ______ my mind to study harder since I visited the Shanghai Supercomputer Centre.

 Hot water_____ in the students’ flats from 5 pm to 7 pm now.

—Alan! Why are you so late?—Sorry! When I          home, I met one of my old friends.

 —You didn’t come to the meeting yesterday afternoon, did you? —No, I ________ at the station for my uncle from Beijing.