Not until_______to work，_______how much time I had wasted.

People have views on the policy published recently. Not everybody is in favor of it.

One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.

big snow lasted nearly half a week.What was worse, they were trapped in the mountain and badly ________ food.

Watching TV___________ is __________bad forour health.