– What else should we pay attention to _______ building the bridge?--The change of the weather, I think..
“Students _____ made no mistakes in today’s exercises please raise your hands.” The teacher said.
--- Time for bed, Dear. --- Not yet, Mum. I _____ until I _____ going over my lessons.
--- Alex, did you find the old house that you used to live in?--- Yes, but with much difficulty, for my hometown has _____ changed over these years.
--- _____ free lunches _____ to students in all schools in China? --- No, only in the countryside.
Zheng He is _____ great pioneer in exchanging cultures _____ Chinese people today still rememberhim.