We don’t know _________, maybe at two o’clock tomorrowafternoon.

Though he started late,Mr Guo played the piano as well as, if , Miss Liu. [ ]

It will be hard for us to say goodbye to our dear classmates and teachers before leaving this school ____________ we have so many wonderful memories together.

Tsinghua University, ________ in 1911, is home to a great number of outstanding figures[ ]

__________, she stood there without saying anything