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Although the medicine can cure you ______ your illness, it has a bad effect ______ you.

Two years ago, three scientists traveled to the Antarctica to explore a secret world hidden _________ the ice.

A great number of people have stopped buying the product ________ the fact that it is safe.

The teacher frowned ___ annoyance when a student fell asleep during his lesson.

—What do you think of Thomas?
—Well, he is good, warm-hearted, hard-working and intelligent; _______, I can’t speak too highly of him.

Bless your heart, I know you didn't break the vase ________. Don't cry!

Harry Potter has even become part of the school curriculum, much ____ the pleasure of the schoolchildren.

____his great love for the works of J. K. Rowling, he has a broad range of interest in other English writers as well. 　　

______ the numbers in employment, the hotel industry was the second largest industry in this country last year.

As a recent survey states, people can hardly enjoy a clear blue sky        because of the high level of PM 2.5.