When ________ later what the call was about, your friend always answers, “Oh, nothing really”
—I’d like to call you at 10 o’clock next Friday morning if it is convenient. —I’m afraid I _______ an important meeting.
What some teenagers don’t realize is ____ difficult life can be if they get addicted to drugs.
_______ in the book, he didn’t notice my coming.
Although this medicine can cure you _______ your illness, it has a bad effect ______ you.
—How long did Mary work here? —For half a year, but she didn’t leave us much ____. We hardly remember what she is like.