He is working hard-----his lessons如题一样要填什么吖?

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He is working hard-----his lessons如题一样要填什么吖?

He is working hard-----his lessons如题一样要填什么吖?
He is working hard-----his lessons
如题一样要填什么吖?

He is working hard-----his lessons如题一样要填什么吖?
填at
work hard at 努力(工作或者学习),在...上下功夫.这里是指“他正在认真学习他的功课.”

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