题目内容
1 2 3
1.Sign I means __________.
A.people must wear protective glasses in this area B.people mustn't wear protective glasses in this area
C.it's dangerous to wear a pair of glasses in this area D.this pair of glasses is dangerous for people's eyes
2.Sign 2 is mainly for __________.
A.students B.teachers C.policemen D.drivers
3.Sign 3 is probably put up __________.
A.on the gate of a park B.on the gate of a school
C.on the wall of a reading room D.on the wall of a post office
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