Stressful environment leads to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.

Diaoyu Islands ________ made up of a group of islands ________China since ancient times.

Have you finished your book report?—Not yet. I couldn’t________on it with so loud music next door last night.

lish class, our teacher often creates anenvironment _____ we are given the opportunity to solve problems ourselves.

The price of the radio ____ , and I don’t know the reason