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單項選擇題

Mary forgot（）a letter to her mother, so she wrote to her just now.

A.writing
B.to write
C.having wrote
D.to have written

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單項選擇題

Mr. White has a wife and three children to（）

A.raise
B.keep
C.grow
D.take

單項選擇題

I know it isn't important but I can't help（）about it.

A.but to think
B.thinking
C.to
D.think

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