【题目】连词成句：plays, he, basketball, Sundays, on （.）
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【答案】He plays basketball on Sundays.
【解析】
plays打，he他，basketball篮球，Sundays周日，on在，根据所给的句号，可知句子是一个陈述句，根据所给词义可以连成句子：他周日打篮球。故答案为He plays basketball on Sundays.