He looked around and caught a man _____ his hand into the pocket of a passenger.
It is not right for some young people to live a life of absolute dependence ______ their parents.
The woman _____ her boss of having broken the labor law because he fired her when she was pregnant.
The business of the company was growing so fast that the manager had to _____ more workers.
However, at times this balance in nature is disturbed, ____ a number of possibly unforeseen effects.
China's population is expected to increase to about 1.5 billion in 2040, ______it will start to decline slowly.