the two children bought some books( )the money they had saved .A with , B by

熱心網友

with我也說不清，但是with這里表示的是用這個東西做事，而by一般都表示通過某途徑。。

熱心網友

A很顯然么，記住固定搭配的了

熱心網友

A

熱心網友

此處我覺得應為WITH,因為我們通常說"用......"可以說:with...(后加具體的東西);in...(后加抽象的事物);using...(加用的對象).如：He earned a lot of money with his own hands./ He is communicating with others in English./She bought some clothes using her own money.(此處沒ＵＳＩＮＧ就另當別論了）而ＢＹ通常表示：方式／依靠／時限／在．．．．．．旁邊等．

熱心網友

with 表示借用什么工具，后面通常跟名詞By表示利用什么手段，后面常接動名詞或者現在分詞上面這位朋友的例句就很好，借用一下：I killed the fly by hitting it.我拍死了蒼蠅。I killed the fly with a newspaper.我用報紙打死了蒼蠅。

熱心網友

A with with 后接工具等by 除了后接交通工具外，都是接方式方法。如：I kiied the fly by hitting it.我拍死了蒼蠅。I kiied the fly with a newspaper.我用報紙打死了蒼蠅。

熱心網友

by with 指隨著.加上.具有.帶有......by 表示方法,手段,指用,通過by 是正確答案