The Australian boy has a good __________ of Chinese and can express himself freely in it.

I _____ it as a basic principle of the company that suppliers of raw materials should be given a fair price for their products.

Many a woman______ important positions in society, which________impossible in the past．

Parents are advised to take pressure ____ a child and give him some encouragement before an exam.

(江苏省南通市2009期末调研)I don’t think that your lecture _______ the audience, for they appeared quite puzzled.