you going to travel during this summer vacation— No, I’ll have to do some part-time job for my study__________, there’s a disease spreading

More and more high-rise buildings have been built in big cities space

We got to the top of a mountain _________ we can see the whole city.

Bad habits, _________ formed, are difficult to get rid of

’t think we have met before — Yes, once at a party, but we _______