—How's the weather today?—________
A．It's rainy. B．It rainy. C．Good.
I can see a sign the tree.
A. in B. on C. at
You ______ litter in the school. Let’s keep it clean.
A. should B. shouldn’t C. can
We can’t _________here.
A. parking B. parks C. park
Does the sign‘No ’?——Yes, it does.
A. mean, writing B. means, write C. means, writing
‘ No smoking’ means we smoke here
A. can B. can’t C. should