詞匯選項(xiàng)
    America's emphasis on the importance of education for everyone has spurred scientific research.
    A、endorsed
    B、enlarged
    C、endangered
    D、encouraged
    【正確答案】D
    【答案解析】spur：促進(jìn)、激勵(lì)；四個(gè)選項(xiàng)：A 簽名、批準(zhǔn)，B擴(kuò)大、放大；C 危及、危害，D 鼓勵(lì)、促進(jìn)；因此答案是D。