Helen always helps her grandmother even though going to school ____ most of her day.[ ]

When I told her that our journey would begin _____ an altitude of more than 5,000 metres, she seemed to beexcited about it[ ]

ch do you have in your pocket—150 yuan, all of _______ came from my grandma.

When you travel in Xinghua, our local guide will show you around Zheng Banqiao Memorial Hall(纪念馆).

________that I could use a specialpiece of cloth to attract people’s attention, I decided to do an experiment.