【2014年山东省临沂市中考】We have friends to help us fight against pollution, and trees are one of ________.
A.themselves | B.they | C.their | D.them |
【2014年山东省临沂市中考】We have friends to help us fight against pollution, and trees are one of ________.
A.themselves | B.they | C.their | D.them |
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