完形填空But the researches say many children have missed out abo

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完形填空But the researches say many children have missed out about 4500 hours of sleep_____ the time they are 7 years old.a by b at c on d during

a,by the time 在什么什么时间以前,on/during the time都很奇怪.
可以直接说when they are 7 years old嘛.
而且你想想看啊,4500除以365都超过10了,孩子怎么可能一天缺少十小时的睡眠时间呢?
所以不能是7岁一年睡眠时间不够,应该是7年,4500÷365÷7大概是1,刚好合适啊.

初一英语完形填空Many children have a birthday cake 26 candles on the many children have formed the habit of reading but ___notes 完型填空today many children have computers,and many parents want 英语完形填空Today is a nice day.There(1)many children in the park. How many children dose the mother have? 完形填空 many ; something ; so ; have ; popular ; but ; them ; w Have missed many times,will have the opportunity in the futu The children have enough money____the tickets.(填空) 英语完形填空Some people say they have an answer to the problems o you have not missed any thing out 五、选择填空.( ) 1.Please say something ______ the race.A.of B.abo We've missed the last bus.I'm afraid we have no choice but t