They really have a great time too, designing everything, drawing the blue prints, _______the angles(角度)and so on.
There are many other examples _______ the development of Chinese writing.
Listen! His family must be quarrelling, _______?
More than one _______ the people heart and soul.
This problem may lead to more serious ones if _______ unsolved.
The Chinese language _______ many Western languages _______ it uses characters which have meanings and can stand alone as words.