问题描述：
几道预备年级的英文题
Some heavy objects ___on cars in the street.
He___ a teacher three years ago.
Our h___is collecting stamps.
第二题 选择 become becomes became
has become
Some heavy objects ___on cars in the street.
He___ a teacher three years ago.
Our h___is collecting stamps.
第二题 选择 become becomes became
has become
问题解答：
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