单选题 PROPAGATE : MULTIPLY ::

(A) dilate : decrease
(B) discern : include
(C) expect : shift
(D) precipitate : happen
(E) deride : excel

【正确答案】 D

【答案解析】The relationship that exists between propagate and multiply can be expressed with the following sentence: "Propagate means to 'cause to multiply.'" Precipitate means "to cause to happen," so this choice best expresses the relationship that exists between the words in the question stem.