Such a good opportunity, once ______, might never come again.
A.lostB.to loseC.losingD.loses
A

試題分析:考查狀語從句的省略:句意:這樣的好機(jī)會,一旦錯過了,可能再也不能回來了。這句話的狀語從句完整的是:Once a good opportunity is lost,當(dāng)主從句的主語一致的時候,可以省略從句的主語和be動詞,所以選A。
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