Don’t mention that at the beginning of the story, or it may _____ the shocking ending.

Teenagers are often treated like _____bigger children, but they are old enough to beindependent.

More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.

(2013·北京高考)________ the course very difficult, she decided to move to a lower level.

(2013·湖北武汉武昌区高三联考)One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there.