1．All the workers ________(belong)to the factory must obey the rule.
2．He wanted to do something in return ________the kindness that she offered him.
3．There is some doubt ________ he is suitable for the job.
4．You could ________(do)better, but you were too careless.
5．The country has been ________ war with its neighbors for more than two years.
6．I searched the whole room ________the lost key, but in vain.
7．I don't know how you all manage to survive ________ your small salary.
8．We all think ________(high) of the historic meeting between Xi Jinping and Ma Yingjeou.
9．________ (late), Catherine Ⅱ had the Amber Room ________ (move) to a palace outside St Petersburg ________she spent her summers.
10．It can be proved ________ China has more people ________ any other country in the world.
