用下列所给的单词的正确形式填空:1、He _____(become) happy when he saw his mother.

问题描述:

用下列所给的单词的正确形式填空:1、He _____(become) happy when he saw his mother.
2、I live on the _____(twelve) floor of the building.

became 因为本句句中从句的谓语动词是saw 一般过去时 所以时态一致 用became 表示变得.
twelfth 因为固定短语live on the twelfth floor 表示 住在第12层
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