( ) ____ is this ? A. Whose B. How C. What
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 hereA. can B. can’t C. should