The little boy _____on the mat ____ to his parents that blackbirds had _____their eggs on Mars．

The concert by Lang Lang was so well ______ that all the tickets had been sold out on the first three days last month.

 Mr. Liu born in a poor family, _____a lot of suffering when still a child.

In class the teacher ___ the finance project in simple but vivid language to make it easier for us to understand.

Our head teacher’s playing the violin _______ our classroom on the New Year’s Party.