this的復(fù)數(shù)

　　例句：

　　1.These injuries were avoidable.

　　這些傷病本是可以避免的。

　　2.These questions frustrated me.

　　這些問題使我懊喪。

　　3.These shoes buckle at the side.

　　這雙鞋從旁邊上扣。

　　4.These houses are soundly built.

　　這些房子蓋得結(jié)實(shí)。

　　5.These peaches are still firm.

　　這些桃子還很硬。

　　6.These shoes are much too tight.

　　這雙鞋太緊了。

　　7.How do these two pieces join?

　　這兩件東西怎樣接合呢？