单选题 Please be careful when you are drinking coffee in case you smudge the new carpet.
【正确答案】 D
【答案解析】[解析] 本句意思:喝咖啡时小心不要弄脏新地毯。crash:撞坏,例如:The door crashed open.门撞开了。pollute:污染,例如:pollute the soil污染土壤。spot:认出,如:She spotted her friend in the crowd.她在人群中认出了她的朋友。stain:弄脏、染污,最符合题意,例如:His crimes stained the family honour.他的罪行玷污了家庭的名誉。