Most of the students haven’t finished their papers on time for __________reasons---one of which was that they carried out a week-long investigation in the countryside.
“This month our family has used ______ water as we did last month.” said Mother .
The information tells me that the way of education in Canada is quite different from _____ in China .
I was surprised ______little birds could eat ______ many insects in ______ a short time.
The headmaster wanted the new classroom building to be _________ as soon as possible .
We Chinese are proud ______ the great success _______ the area of science and technology .