— How long is it ______ you picked up your badminton training?— It was not until my finance became better in last December ______ I started the training.

He is very old, ______ he still works very hard.

Before long the Greens moved to a bigger city ____ the children could attend a better high school.

In the continuous high temperature weather, it is not to fit to gather. That is      we cancel the discussion

It is difficult for any of us to eat better, exercise more and sleep enough _________ we know we should.