145.gentlemen always shake hands when__to each other.A to introduce B introduced C intrduce D introducing146.it was __he was ill that day__he knew nothing about the accident.A as;which B because;that C since;when D for;why为何选BB
问题描述：
145.gentlemen always shake hands when__to each other.
A to introduce B introduced C intrduce D introducing
146.it was __he was ill that day__he knew nothing about the accident.
A as;which B because;that C since;when D for;why
为何选BB
答
145 when (they were) introduced 括号里省略了。
146 是一个it was ...that的强调句型。
答
1.题意是当绅士被介绍给别人的时候,他们会握手.when后省略了they are.
2.这是个强调句,前面表原因选because,不好选哪个“因为”,后面也只能选that.固定句式.