Air pollution together with littering ____ many problems in our large industrial

【#Air pollution together with littering ____ many problems in our large industrial#】

1、A

2、答案A．

3、根据句中的时间状语today，可排除C；横线处缺少谓语动词，而causing是非谓语动词，可排除D．当主语为单数名词或代词，尽管后面跟有with，together with，except，but，like，as well as，rather than，more than，no less than，besides，including等引起的短语，谓语动词仍用单数形式；若主语为复数，谓语用复数形式．在本题中主语是air pollution，是单数的名词，故谓语动词使用单数的形式，排除B．故答案选A．

【#Air pollution together with littering ____ many problems in our large industrial#】到此分享完毕，希望对大家有所帮助。