The humble tomato could become a(n) potent weapon in the fight against prostate cancer.
【正确答案】 B
【答案解析】解析：题干：不起眼的西红柿可能成为抗击前列腺癌的利器。划线词potent是“有效的”；A．inexpensive廉价的；B．powerful强有力的；C．conventional传统的；D．lethal致命的。