题干
It's our duty to _______ people _______ too many trees.
A：stop; cutting down
B：prevent; to cut down
C：keep; cutting down
D：make; cut down
答案(点此获取答案解析）
A
It's our duty to _______ people _______ too many trees.
A：stop; cutting down
B：prevent; to cut down
C：keep; cutting down
D：make; cut down
