Excuse me，Mr. Li,_________ I close windows? It’s cold now.–Yes，you__________

Why do you look so tired? －The noise upstairs made me the whole night.

It was in the wooden house______ a businessman built by collecting funds______ the great scientist carried out the experiment that made a difference.

How often ___________ the Olympics _____________? —Every four years.

Oh, a nice photo! Is this your uncle’s child?—Yes, it’s my .