The speaker mainly discusses ______.A．the growth of the printing industryB．the history of

The passage mainly discusses ______.A．the development of art historyB．the difference betwe

This passage mainly discusses ______ .A．the functions of carbon dioxide and waterB．the rol

The speaker was very good at____his ideas during the discussion.（2012－73)A．putting asideB．

The passage mainly discusses about______.A．business competitionB．buyers and sellersC．busin

The second paragraph mainly discusses______.A. a

The passage mainly discusses ______.A.the necessity of social changeB.certain factors that