What does the sign mean? What does the sign mean?

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11. What does the sign mean?
A. You can swim here.
B. You can't swim here.
C. You should swim here.
D. You swim here.
12. What does the sign mean?
A. People should cross the road at the crosswalk.
B. People can't cross the road here.
C. People are crossing the road at the crosswalk.
D. People shouldn't cross the road here.
13. It's very cold at night
bring a jacket.
A. so
B. don't
C. you don't
D. you shouldn't
14. You
swim in that water. It's very dangerous.
A. so
B. you don't
C. can't
D. you shouldn't
15.
I go in October?
A. Need
B. Should
C. Can't
D. Should not