解析：words即指后面的PAID IN FULL几个字。

　　答案：A

　　.任务型阅读/任务型读写

　　阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。

　　注意：每个空格只填一个单词。

　　Many people believe they are supposed to drink eight glasses of water a day， or about two liters. Why？ Because that is what they have been told all their life. But a recent report offers some different advice. Experts suggest people should obey their bodies： they should drink as much water as they feel like drinking.

　　The report says most healthy people meet their daily needs for liquid by letting thirst be their guide. The report is from the Institute of Medicine， which provides scientific and technical advice to the government and the public. The report contains some general suggestions. It says women should get about 2.7 liters of water daily and men about 3.7 liters. But wait—in each case， that is more than eight glasses.

　　There is an important difference. The report does not tell people how many glasses of water to drink. In fact， the experts say it may be impossible to know how many glasses are needed to meet these guidelines. This is because the daily water requirement can include the water content in foods.

　　As you might expect， the Institute of Medicine says people need to drink more water when they are physically active. The same is true of those who live in hot climates. Depending on heat and activity， people could need twice as much water as others do.

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