The scientist decided to devote his life to ____ pollution from ____ again.
Mr. Brown repeated his words to his son, raising his voice a bit, but still no answer.
Circumstances are human control, but our conduct is in our own power.
—I wonder why you didn’t take part in the speech contest yesterday afternoon. —I'm terribly sorry, I________ myself.
It is not our mistakes that define who we are; it is how we from those mistakes that counts.
Don't worry. It's just a regular blood test. It'll finish within seconds.