单项选择题

It is obvious that concrete bridges are superior（）wooden ones.

A. with
B. to
C. against
D. for

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单项选择题

During the past twenty years, there have been（）changes in the country.

A.permanent
B.powerful
C.imaginary
D.dramatic

单项选择题

Jenny was a very kind and beautiful woman and many men were in love with her and wrote to her to say how much they loved her and wanted to marry her. Jenny kept all these letters and tied them up and put them away in an old box. She never looked at them after she was happily married. Jenny had a daughter Sue. She was six. One day, Jenny had to leave Sue alone for half an hour. Now, be a good girl, she said. Play quietly at home. When she returned home, she asked Sue, Have you been a good girl Oh, yes Mummy, Sue said. What did you do while I was out Jenny asked. I’ve played a mailman, she told her. How could you play mailman, darling Jenny asked her. You don’t have any letters. Oh, yes, I did, Sue said. I found some in an old box upstairs. Then I put one in each mail box in the street. Wasn’t I a good girl （）

A. Because Jenny loved their letters.
B. Because Jenny was rich and happy.
C. Because Jenny wanted to get married.
D. Because Jenny was kind and beautiful