By the end of this year, we _____ 2000 English words.
.Some students often listen to music___classes to refresh themselves.
—What does the sign over there read?—“No person___smoke or carry a lighted cigarette,cigar or pipe in this area.”
When you get the paper back,pay special attention to what______.
How about taking___short break?I want to make___call.
—Thank you for joining in our conversation tonight.—_______.