单选题 CleanGreens! Clever choice
The use of prewashed，prepackaged products such as various fresh salad mixes has become very popular．The consumer must be aware that these mixes are washed in a chlorine-based rinse and residues will remain．Washing these products in CleanGreens!will turn the chlorine into harmless，odorless，tasteless chloride．You will also be amazed at how much dirt washes off even though you presume them to be perfectly clean．
CleanGreens!is made from all food-grade ingredients that are biodegradable，will not penetrate cell walls，and wash off completely．
Remember．one 8-ounce bottle of CleanGreens!will dilute to 16 gallons of ready-to-use solution．This is equiv-alent to over 170 refills of a popular 12-ounce bottle sold in markets for $4．95 per bottle.The big difference is that CleanGreens!actually works!We guarantee Clean-Greens!to show far superior results to these products．We urge you to try this outstanding product and draw your own conclusion．
单选题 There are still residues in prewashed，prepackaged products．
【正确答案】 A
【答案解析】“在预先清洗过并包装好的产品中仍有残留物。”
在做本题时，考生即使不认识“residue"’一词，也丝毫不会影响对整个句子正误的判断。只要把下面说的关系判断出来就可以了：第一段第二句话中的“these mixes”指的就是第一句中的“various。fresh salad mixes”，后者又出现在“such as”后面，所以“rayious fresh salad mixes”是“prewashed，prepack-aged products”中的一种。根据第二句话，此描述是正确的，所以选A。
单选题 CleanGreens!can remove the residues in fresh salad mixes．
【正确答案】 B
【答案解析】“CleanGreens!可以去除新鲜的半成品沙拉中的残留物。”
从第一段第三句话可知CleanGreens!的作用是"turn the chlorine into harmless，odorless，tasteless chloride"，意思是把残留物如氯变成无害、无臭、无味的氯，而非去除。"turn…into…"并不等同于"remove"，所以选B。
单选题 Chlorine does great harm to health．
【正确答案】 C
【答案解析】“氯对人体健康有害。”
文中未提及氯是否对人体有害，所以要选C。
单选题 CleanGreens!is a kind of green food．
【正确答案】 B
【答案解析】“CleanGreens!是一种绿色食品。”
读完第一段就可以判断出CleanGreens!是一种用来洗涤蔬菜水果的洗涤剂，而非食品。
单选题 CleanGreens!will make food healthier．
【正确答案】 C
【答案解析】“CleanGreens!会使食物对健康更有利。”
文中没有提到相关内容，所以选C。
单选题 CleanGreens!can be removed by water．
【正确答案】 A
【答案解析】“CleanGreens!可以用水洗掉。”
倒数第二段告诉读者CleanGreens!所含的都是可降解的食物级的成分(food-grade ingredients that are biodegradable)，而且不会穿透细胞壁(will not penetrate cell walls)，并且可以完全洗掉(wash off completely)。考生在这里要注意wash off指的是洗涤剂能够全部用水冲掉，不会残留在瓜果蔬菜上。因此A为正确选项。
单选题 CleanGreens!is more effective than other products．
【正确答案】 A
【答案解析】“CleanGreens!比其他产品的效果更好。”
文中第三段的第三句话“We guar’antee CleanGreens!to show far superior results to these products．”表述的就是这个意思。虽然广告难免有夸大其词之嫌，但这不是我们完成此题时需要考虑的，我们只根据文章来进行判断。因此，应该选A。