China is a mountainous country.Hills,mountains,and plateaus cover _______ of the total area.
C
暂无解析
By the middle of the 21st century, the vast majority of the world ’s population will be living in cities _______ in the country.
Motivationandpersonalitymay________thevaryingdegreesofsuccessinone’scareer.
Why couldn ’t you ________ an answer when I asked you why you were late?
Scientistsdoubtwhetherit’s________toregulateone’sbiologicalclockbydrinking.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.