He expressed his hope ___ he would visit China again the next year, and this was the very hope ___ he expressed as soon as he arrived in the country.
________has recently been done to provide more English books for the students, a shortage of reading materials remains a serious problem.
There are many insects in the world that never do _______ harm to human beings.
_____ it is _____ you obtain, you should share _____ your parents your feelings.
A greenhouse is a building _______ of glass _______ for keeping plants warm when the outside temperature is low..
She is the only one of the persons ________ from the mistakes.