题干
Mr Li says learning English ______ action, or we will get nothing.
A：requires
B：reduces
C：refuses
D：realizes
答案(点此获取答案解析）
A
Mr Li says learning English ______ action, or we will get nothing.
A：requires
B：reduces
C：refuses
D：realizes
，满足
，且
，
.则
=.（ ）