Make a sign to tell people________.A.what they must do B.what do they must C.what must they do D. WHAT THEY DO MUST

问题描述:

Make a sign to tell people________.
A.what they must do B.what do they must C.what must they do D. WHAT THEY DO MUST

A.what they must do
给大家指示一下哪些是必须做的.