It was yesterday ____ I saw her and it was almost 10 o’clock ____ she arrived.

d some fresh air, so I am going out for a walk—________

As _____ sports fan, I’m looking forward to watching ____ 31st Olympic Games in Rio, Brazil.

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

The experiment turned out to be a complete failure, _____ wasn’t _____ they expected．