Recently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land, thus _____it less fertile.
Please, could you leave me alone? Your being here just ________ my trouble. A. adds in B adds to C adds up D adds up to
He ________ in a foreign trade company for five years, but he now is a volunteer teacher in a village.
The price of food is _________ this year than that of last year.
Will future scientific discoveries ______ for us to live a much longer life?
In the meeting, the professor expressed his thanks for the aid he _________ from his students.