Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.
________ they heard the shout for help,they rushed out.
You should make it a rule to leave things ________you can find them again.
This is the best book _____ I have been looking for all this year.
Lucy has a great sense of humour and always keeps her colleagues _____ with her stories.
_____ do you think will teach us maths next term?