Heroes ______ their life ______ becoming the best they can be, whether it is President of the United States, a mother, or a firefighter.
—What's wrong with your face? —I'm allergic ________ this kind of weather. Nothing serious.
Although the price has gone up by 5%,it's still ________ the limit set by the government.
Ted is such a helpful colleague that he is willing to do, ________, any favour we might ask him.
The remarkable shift ________ young people's job preference in recent years has analysts and educators greatly concerned.
We'll learn much from this failure, so our suffering and efforts are not ________.