The reason __being late for the meeting was__his little son fell ill this morning.[ ]

In the 1990’s, many well-educated young people went to Hainan Island ____their jobs.[ ]

The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.

I often ________ with my friends when I was young .

In English class, our teacher often creates an environment _____ we are given the opportunity to solve problems ourselves [ ]