词汇选项：
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.
词汇选项：
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.
