________ the scandal among his colleagues, Mr. Williams would have been promoted to the position as director.
A. . If he did not spread
B. . Had he not spread
C. . Did he not spread
D. . Should he not spread
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Malcolm X would rather be fully occupied with copying a dictionary and reading aloud __________ the time away in prison.
A. . more than to idle
B. . than idle
C. . rather than to idle
D. . more than idling
A pen is to a writer __________ a gun is to a fighter.
A. . as
B. . what
C. . that
D. . like
________, Malcolm X would not have been able to join the world community of thoughts and actions.
A. . If he didn’t study English very hard through self-learning
B. . Were he to study English very hard through self-learning
C. . Had he didn’t study English very hard through self-learning
D. . Hadn’t he studied English very hard through self-learning
18.有关食品安全的正确表述是（ ）
A. 经过灭菌，食品中不含有任何细菌
B. 食品无毒、无害，符合应当有的营养要求，对人体健康不造成任何急性、亚急性或者慢性危害
C. 含有食品添加剂的食品一定是不安全的
D. 食品即使超过了保质期，但外观、口感正常仍是安全的
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