题目内容
Many young people in the West are expected to leave ____ could be life's most important decision — marriage — almost entirely up to luck.
A.as B.that C.which D.what
D
考查名词性从句。句意:西方的很多年轻人期望把婚姻——可能是人生中最重要的决定——几乎完交给运气(来决定)。leave 后的部分是宾语从句,what 在从句中作主语。

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