Jeniffer is worthy ________ smoking as she suffered a lot from lung problem.

The house price has been rising quickly in the past years.—Yes. I cannot ________ to buy a small apartment even with my parents’ help.

No matter _____great progress you have made in your studies, you should continue to work hard.[ ]

our earth, or else it will be no longer fit for us to live on

What __heavy rain it was！—Yes, but I love___ air after it rains. It smells so fresh.