The TV program Dad, where are we going?, five dads and their kids take a journey in different places, becomes hot in China.
__________ fire, all exits must be kept clear.
Some students often listen to music __________ classes to refresh themselves.
— __________ when has the country been open to international trade? — 1978, I suppose.
— I think he is taking an active part in social work. —I agree with you __________.
I have offered to paint the house __________ a week’s accommodation.