You should have put the milk in the icebox; I expect it ______ undrinkable by no

游客2024-10-23 51

问题 You should have put the milk in the icebox; I expect it ______ undrinkable by now.

选项 A、became
B、had become
C、has become
D、becomes

答案 C

解析动词时态。should have done表示过去应该做却没有做之事；by now这个时间状语说明应该使用现在完成时。

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