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 Ameri...

10."I'm (redundant),"Dorothy thought,then realized she was speaking out loud. A. not worried B. not careful C. not happy D. not needed ...

4.Two basic models of parental influence emerge from all this competition and variety,however.One, loosely based on Freudian ideas,has presented an image of the vulnerable child:children are sensitive beings,easily damaged not only by traum...

20.She ought to stop work；she has a headache because she ______ too long. A. has been reading B. had read C. is reading D. read ...

14.What he said just now had little to do with the question _______ discussion. A. on B. in C. under D. at ...

8.Mike＇s uncle insists ______ in this hotel. A. staying not B. not to stay C. that he would not stay D. that he not stay ...

2.I don＇t mind ______ the decision as long as it is not too late. A. you to delay making B. your delaying making C. your delaying to make D. you delay to make ...

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. Oth...

10.Does everyone on earth have an equal right _______ an equal share of its resources A. by B. at C. to D. over ...

18.Once environmental damage _______, it takes many years for the system to recover. A. has done B. is to do C. does D. is done ...