题目内容：

    It is common for adults to use ''baby talk'' when interacting with babies. This way of speaking attempts to imitate the sounds babies make when they first try to talk. But is this form of communication helpful to a child’s development?

Several studies have suggested a clear link between parental language methods and a child's early language development. Studies showed that language learning in babies was improved when parents spoke more than a few simple words and used a wider vocabulary. Earlier research found that the style of speech used by parents to communicate with their baby could have an influence on language development.

One such speaking style is known as ''parentese''. Research has shown that babies react better to this kind of language in the first months of life. Generally, parentese involves adults speaking in a higher voice and at a slower speed. The language is simplified, while sentences are short and often repeated. Studies from the past 30 years have confirmed that babies spoken to in parentese developed larger vocabularies throughout the first three years of life.

A new study on the subject, a project of the University of Washington's Institute for Learning & Brain Sciences, examined whether parents can be effectively taught methods to improve their parentese skills.

Naj a Ferjan Ramírez. working in the Institute for Learning＆Brain Sciences, said that the parents involved in the research were first shown the importance of language input for their baby's development. Parents were then given suggestions on how to use different parentese methods, and then rated on how well they used these methods with their child. She added that the new study is important because there are still a 1ot of parents with little knowledge about how to use parentese to help their child. This was one reason the researchers included parents from different cultural and economic groupings.

1.How do parents usually talk with their babies?

A.By speaking in a funny style. B.By copying babies' sounds.

C.By raising speaking speed. D.By whispering in babies’ears.

2.What can we learn from the second paragraph?

A.Babies' language skills are decided by talent.

B.Babies' language is improved by simple words.

C.Parental language style helps improve babies' behavior.

D.Parental language methods affect babies' language development.

3.Where can you find how parents were trained in parentese skills?

A.In paragraph 2. B.In paragraph 3.

C.In paragraph 4. D.In paragraph 5.

4.What can be the best title for the text?

A.Communicating with babies matters more

B.Parentese is a good way to practice language

C.The more parents help, the better babies 1earn

D.Speaking parentese helps with babies' language learning