But i think it is (u ) to know the grreat things and (h ) in the past.

来源:百度知道 编辑:UC知道 时间:2024/05/14 18:46:36
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useful 本句用到”it is adj (for) sb to do sth.由此可肯定第一个词应为形容词.从”u"可看出应填useful

humans 由"things "可猜出第2个词应为名词.与”things "有较大关系的是”human",因为”things"为复数.所以”human"应加”s "("and"前后时态应一致)

useful
humans

useful
histories