单选题 PROPAGATE : MULTIPLY ::

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