John ______ (leave) his keys in the office so he had to wait until his wife came home.

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问题 John ______ (leave) his keys in the office so he had to wait until his wife came home.

选项

答案had left

解析 本题考查动词时态的用法。句意显示,“忘带钥匙”发生在“等待”之前,所以要用过去完成时。该句意为:John把钥匙落在了办公室,所以他不得不等他的妻子回家。
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