题文
We must plant more trees after we _____ every year.
| A．cut off them | B．cut them off |
| C．cut down them | D．cut them down |
We must plant more trees after we _____ every year.
| A．cut off them | B．cut them off |
| C．cut down them | D．cut them down |
试题篮
()
粤公网安备 44130202000953号
