11.??Copper(铜)was the first metal that man learned to make.In some mountainous lands there were rocks streaked with green minerals.One day some rocks were accidentally heated by a roaring fire.When the fire burned low,little beads of coppe...

2.??While death might (beckon)at any time,its dark shadow came directly into their home sometime after dusk every Thursday. A. make an unnoticed departure B. make a signaling or summoning gesture C. make a sudden dash D. m...

2.??Although American civilization took over and replaced the frontier almost a century ago,the heritage of the frontier is still very much alive in the U.S.today.The idea of the frontier still stirs the emotions and imaginations of the Ame...

8.??"I can't take all the (bending) any longer,"she said. A. standing B. working C. stooping D. sitting ...

1.??But,watching through the window as Tim hurried through the (downpour) from pig barn to cattle shed,she knew the answer. A. stream of water B. heavy fall of rain C. narrow path D. big expanse ...

16.??Excuse me. If your call＇s not too urgent, do you mind _______ mine first? A. I make B. if I make C. me to make D. that I make ...

11.??After a few rounds of talks, both sides regarded the territory dispute _______ . A. being settled B. to be settled C. had settled D. as settled ...

6.??Between 1974 and 1997，the number of overseas visitors expanded ______ 27%. A. by B. for C. to D. in ...

1.??Niagara Falls is a great tourist ______ drawing millions of visitors every year. A. attention B. attraction C. appointment D. arrangement ...

16.??_______, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor. A. Other things being equal B. Were other things equal C. To be equal to other things D. O...