Allergies to eggs and peanuts can be deadly. However， researchers say that giving eggs and peanuts to babies may stop them getting allergies. The researchers watched over 200，000 babies when they first ate eggs and peanuts. They found that if 4-6-month-old babies ate eggs， they were 40 per cent less likely to get an egg allergy. Babies aged 4-to-11 months old who ate peanut products were 70 per cent less likely to get a peanut allergy.
　　Egg and peanut allergies are the two most common childhood food allergies. Parents must be careful because babies can choke（噎住） on whole nuts. They should also only eat smooth peanut butter. Other food allergies are to soy（大豆）， wheat and seafood. Giving these foods to babies one at a time may protect them. Parents should check their baby’s health after each new food. More research is needed to find the best ages to start giving eggs and peanuts to babies.
　　Questions：
　　1. Why should eggs and peanuts be given to babies？
　　2. How many babies are studied in this passage？
　　3. What are the two most common childhood food allergies？
　　4. What should parents do after each new food？
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　　答案：
　　1. Because they may stop babies getting allergies.
　　2. Over 200.000（babies）.
　　3. Egg and peanut allergies.
　　4. They should check their baby’s health