问题
选择题
Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better. [ ]
A. may
B. will
C. must
D. should
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better. [ ]
A. may
B. will
C. must
D. should
答案：A
