- Some students often drop litter carelessly in our school. What can we do?
- We can _______ some signs to remind them not to do that again.
A.put up | B.put off | C.put away | D.put on |
- Some students often drop litter carelessly in our school. What can we do?
- We can _______ some signs to remind them not to do that again.
A.put up | B.put off | C.put away | D.put on |