A-A+
You should have put the milk in the icebox; I
问题详情
You should have put the milk in the icebox; I expect it ______ undrinkable by now.
A.became
B.had become
C.has become
D.becomes
参考答案
正确答案: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。