These natural parks are very important for preserving many animals, which would ______ run the risk of becoming extinct(灭绝的)．

While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.

She didn’t mention her troubles to Mr. Li，who might have helped her ______.

Men are equally as good as women at taking care of others; better ______, male nurses can be a great help in keeping patients still while they receive painful treatment.

The town official broke ________ for working over time in the search for the trapped people after the earthquake.