题目内容
9. My younger brother is really . He often works in his office far into the night.
9. hard-working hard-working勤劳的，努力工作的。句意：我弟弟真是努力，他经常在办公室工作到深夜。
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题目内容
9. My younger brother is really . He often works in his office far into the night.
9. hard-working hard-working勤劳的，努力工作的。句意：我弟弟真是努力，他经常在办公室工作到深夜。