most young kids think their should (a ) then to have more free time 根据首字母提示填空

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• most young kids think their should (a ) then to have more free time 根据首字母提示填空please help me
• 根据句意和首字母提示完成句子,每空一词1.Luckily ,he has an o—— to get an advanced study in Beijing.2.Most children can not c—— on one thing for a long time.3.The main difficulty to do the work is we have no e——.4.I'm worried that you will f—— the exam.5.Young kids should not be allowed to get their ear p——.6.Teenagers should not be allowed to drive because they are not s—— enough.7.Don't be s——!He won not tell you the truth.
• most young kids think their should (a ) then to have more free time 根据首字母提示填空
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• 有甲、乙两种铜和银的合金，甲种合金含银25%，乙种合金含银37.5%，现在要熔制含银30%的合金100千克，两种合金应各取多少？