______ their homework, these three students have to stay in the classroom for another thirty minutes.
On the wall __________ two large portraits.
Would you mind __________ games here?
To improve the quality of our products, we asked for suggestions __________ had used the products.
—How about camping this weekend, just for a change? —OK,__________ you want.
At the meeting place of the Yangtze River and the Jialing River __________, one of the ten largest cities in China.