单项选择题

The（）of such I. Q. tests full of questions on American culture was not questioned at that time.

A. significance
B. validity
C. efficiency
D. justification

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A good deal of the （） for his achievement in this field...

单项选择题A good deal of the （） for his achievement in this field must go to his supervisor, Professor Fang.

A. credit
B. reputation
C. respect
D. praise

Smoking is so harmful to personal health that it kills ...

单项选择题Smoking is so harmful to personal health that it kills people each year （）than automobile accidents.

A. seven more times
B. seven times more
C. over seven times
D. seven times

The microscope can （）the object 100 times.A. magnifyB. ...

单项选择题The microscope can （）the object 100 times.

A. magnify
B. increase
C. develop
D. multiply