America's emphasis on the importance of education for everyone has spurred scientific research.
A、endorsed
B、enlarged
C、endangered
D、encouraged
【正确答案】 D
【答案解析】 spur：促进、激励；四个选项：A 签名、批准，B 扩大、放大；C 危及、危害，D 鼓励、促进；因此答案是D.
America's emphasis on the importance of education for everyone has spurred scientific research.
A、endorsed
B、enlarged
C、endangered
D、encouraged
【正确答案】 D
【答案解析】 spur：促进、激励；四个选项：A 签名、批准，B 扩大、放大；C 危及、危害，D 鼓励、促进；因此答案是D.
