晚饭后散步有利月我们的健康._____a walk after supper____________our health.

晚饭后散步有利月我们的健康._____a walk after supper____________our health.
他宁愿使用这个旧文具盒,与不愿买个新的.
He would rather use__________________________a new one.
年轻人总是在与父母交谈时有困难.
Teenagers always have________ _______ ______ their parents.