5.the paradox that standing is more tiring than walking.
站着比走路还累这一似非而是的说法
6.I found it tiring to begin with but I soon got used to it.
刚开始时我觉得很累, 不过很快就适应了。
7.If it is too slopy it is more tiring to mow the lawn.And just have to remember that your car might skid when you go in and out of the garage when snow.