We can _______ ourselves because we have already been old enough.
A . depend on B . work on C . get on D . put on
A
【详解】句意:我们可以靠自己,因为我们已经足够大了。
考查动词短语。 depend on 依靠; work on 从事; get on 上车; put on 穿上。根据 “because we have already been old enough” 可知岁数足够大了,可以依靠自己。故选 A 。