We must do something to ________ the fac
题型:选择题
问题:
We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.
A.keep
B.protect
C.permit
D.prevent
We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.
A.keep
B.protect
C.permit
D.prevent