1. The r will hold an open today.
2. in Waltham will hold an open house at 6:30 p.m. tonight.
3. will hold its weekly trivia contest
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4. s boys' and girls' varsity track teems Arlington High School at home.
5. The Waltham School Committee will meet tonight at 7:30 p.m. at Waltham High School.
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