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

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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

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
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

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.