单项选择题
A.quantity is an important factor B.families are better off with working wives C.middle-aged people are more attractive on TV D.crime is associated with people's age
A.A good Mandarin. B.Good manners. C.Higher educational background. D.All of the abov
A.Hong Kong plays an important part in the trade between China and the world B.Cantonese is the official language of Hong Kong C.English is the mostly-used language in business D.Mandarin is as important as English in business