To help the environment, many Americans have made the change from paper and plastic bags to reusable shopping bags.But a report by a Florida newspaper says that reusable shopping bags sold by some supermarkets have high levels of lead(鉛), which can be dangerous to humans, especially young children.Now, there’s a call for a rethink about the use of reusable shopping bags.

“When our families go to the store looking for safe and healthy foods, the last thing they should be worrying about is a bag，”Charles Schumer, a government official said.“Quick and complete research will allow everyone to make right decisions.”

The newspaper bought more than a dozen bags sold at Publix supermarkets from Florida supermarkets to test them for lead.The results showed that certain bags had lead levels that worried health officials.Some bags had enough lead in them to be considered dangerous waste if people were to throw the bags out with other rubbish.Lead in the bags is not likely to move onto food.But over time, paint (油漆) on the bags can break off and the bags can wear out.When this happens, lead can be freed.

The affected (受影響的) bags were found in Florida.But Publix has more than 1，000 stores across America.Publix says that its bags don’t break any laws about lead levels, but that they have asked the makers of the bags to reduce(降低) the lead levels in them.

The bags with the highest levels of lead had beautiful designs and many pictures.Plain reusable bags without them are found to have little lead.People worried about lead levels in reusable bags can turn to cloth.Paper bags are also a good choice, since paper can be reused.

1.What worries people now is that reusable shopping bags ________．

A. can’t be reused

B. can be a danger to people

C. are a waste of money

D. are as bad as paper bags

2.The underlined word “them” in Paragraph 3 refers to “________”．

A. bags B. foods

C. supermarkets D. officials

3.Lead in shopping bags will probably come out when ________．

A. food is put in them

B. they are thrown away

C. they are put with other rubbish

D. the paint is separated from them

4.What’s the best title for the text?

A. The return of paper bags

B. Time to invent greener shopping bags

C. The safety of shopping bags

D. Look out for reusable shopping bags

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