27.After his wife died, he kept himself _____ from other people and the outside world,
Don’t handle the vase as if it _________ made of steel.
In order to find the missing child, the villagers___________ all they can in the past five hours.
With a lot of problems _________,the manager felt like a cat on hot bricks.
._______________ you have finished your work,you might as well relax yourself now.
The top leaders of the two countries are holding talks in a friendly ______________.