作业帮He finds it hard ________ his class
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/04 16:44:27
He finds it hard ________ his class
He finds it hard ________ his class
He finds it hard ________ his class
to catch up with
赶上
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来源：学生作业帮助网 编辑：作业帮 时间：2024/10/04 16:44:27
He finds it hard ________ his class
He finds it hard ________ his class
He finds it hard ________ his class
to catch up with
赶上