题目

Nearing the age of 101 has not slowed down one Japanese woman．In fact，in the swimming pool—she is only getting faster．Recently，a 100-year-old Japanese woman became the world’s first centenarian to complete a 1，500-meter freestyle swimming competition in a 25-meter poo1．Her name is Mieko Nagaoka．Ms．Nagaoka set a world record for her age group at a recent Japan Masters Swimming Association event in the western city of Matsuyama．She swam the race in 1hour，15 minutes and 54 seconds．By comparison，the overall female world record holder completed the same dista（·株洲二中高三第一次月考） 31. Parent should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather. A. unless          B. because                C. though          D. so