the world economy is in difficulty, we can see, the people of China are full of hope.
Many difficulties have ______ as a result of the changeover to a new type of fuel.
——Why are the tax collectors so busy?——Many people prefer to have their tax forms completed by a professional rather than ___.
It was in the small house _______ was built with stone by his father _______ he spent his childhood.
Nothing that he suggested _____ to be of any use.
--- What do you think of the speech?--- The speaker said _____ nothing worth listening to.