Two middle-aged passengers fell into the sea. _______, neither of them could swim.

I am not sure exactly how much money you will receive, but it will______cover your major expense.

 I’d like to start my own business next year – that’s _________ I will face my big challenge in life.

With the word “ PM2.5” _________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.

 -Do you think an advertisement is a help when you look for a job? -Well, it depends. __, it give me a chance to try.