题干
—What does the sign on the wall mean?
—It tells us _______.
A：to talk
B：to keep talking
C：not talking
D：not to talk
答案(点此获取答案解析）
D
—What does the sign on the wall mean?
—It tells us _______.
A：to talk
B：to keep talking
C：not talking
D：not to talk
