例句：
1.These injuries were avoidable.
这些伤病本是可以避免的。
2.These questions frustrated me.
这些问题使我懊丧。
3.These shoes buckle at the side.
这双鞋从旁边上扣。
4.These houses are soundly built.
这些房子盖得结实。
5.These peaches are still firm.
这些桃子还很硬。
6.These shoes are much too tight.
这双鞋太紧了。
7.How do these two pieces join?
这两件东西怎样接合呢？