______ exercising, and you’ll be healthier.

Maths _______ my favourite subject.

The first African-American president of the United States received a（n） _____ welcome in the African countries, where he was received as a returning son．

It is said that it may be another two months _____________we can have a new hall.

So, it was a win-win situation _______was why we did not hesitate _______ with them.