The mother bought telescope for his son_____he could observe the skies ,which
made the son very happy
1.whom
2.which
3.for whom
4.through which
要原因
人气：347 ℃ 时间：2019-09-20 13:11:59
解答
4
先行词是telescope 从望远镜中观察用 observe through the telescope
所以选through which
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