题目内容

9、 (2011年东北三省四市联考)—We should recycle everything we can.

—Absolutely.These may seem little things，but they’re not________it comes to saving the environment.

A．since                     B．when

C．while                    D．as

试题答案

9、解析：选B。考查连词。when it comes to...是固定用法，意思是“当提到……；当涉及……”。其他几项不合题意。