ps:一般认为:被强调部分指人时,用that或who均可(强调指人的宾语时有时用whom),指事物或情况时通常用that。即使被强调部分是时间状语或地点状语时,也只能用that,不用when或where。如: It was in the zoo that(不用where)Xiao Yang met your sister yesterday. It was yesterday that(不用when)Xiao Yang met your sister in the zoo. (选自张道真《实用英语语法》) 平时也有见到过强调时用where和when的,但是一般认为那样用不规范。
We would appreciate your pushing the sale on your market. 十分感谢贵方在你方市场上推销所作的努力 It is in pushing the sale of Chinese toys in your country ( ) we assure you of our cooperation. 我们确定我们的合作是由于在你方中国玩具市场上所作的努力。 是强调句It is/was 。。。。that。。。。句型。选A