It is usually warm in my hometown in April, but it ________ be rather cold sometimes.
—What does the sign over there read? —No person ________smoke or carry a lighted cigarette ,cigar or pipe in this area.
It’s a pity that the quarrel________their friendship.
The number of traffic accidents caused by drinking is ____ as the number of those caused by non-drinking driving.
In China ______ graduates go abroad to have a further study every year .
----- Where did you get to know her? ---- It was on the farm _______ we worked.