We should try our best to make ______ world that is safer, cleaner and healthier than ____ one we are living in now.
| A．the; / | B．a; / | C．the; the | D．a ;the |
We should try our best to make ______ world that is safer, cleaner and healthier than ____ one we are living in now.
| A．the; / | B．a; / | C．the; the | D．a ;the |
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