单项选择题

A ball has been rolling at the constant rate x cm/min. How many centimeters has it roiled in the last y seconds（）

A.A
B.B
C.C
D.D
E.E

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单项选择题

A membership list of 720 people shows that 36 have first and last names that begin with the same letter. If a person is selected at random, what is the probability that his or her first and last name does NOT begin with the same letter（）

(A) 0.05
(B) 0.25
(C) 0.50
(D) 0.75
(E) 0.95

单项选择题

Honesty is not a ______ human attribute, but rather a central virtue, whose existence is seemingly being ______ by selfish desires.

(A) superficial .. undermined
(B) trivial .. enhanced
(C) pervasive .. threatened
(D) worthless .. supported
(E) resilient .. forestalled

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