To protect the environment, the local go
题型:选择题
问题:
To protect the environment, the local government has put up a lot of ______ to warn the citizens not to litter the ground.
A.sighs
B.sights
C.signals
D.signs
To protect the environment, the local government has put up a lot of ______ to warn the citizens not to litter the ground.
A.sighs
B.sights
C.signals
D.signs