选择题：Gina couldn’t open the front door because she ( )

题目内容：

Gina couldn’t open the front door because she ( ) the key.

A.forgets
B.was forgetting
C.had forgotten
D.has forgotten

参考答案：

Put the following words in appropriate groups:comp

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空题,0.7分] Fill in the blanks with appropriate unit noun:a __________ of candy

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