问题
选择题
It's our duty ______ our classroom clean and tidy. [ ]
A. make
B. making
C. made
D. to make
答案
答案：D
搜题请搜索小程序“爱下问搜题”
It's our duty ______ our classroom clean and tidy. [ ]
A. make
B. making
C. made
D. to make
答案：D