An entire industry has been developed to provide educational DVDs designed for infants. These DVDs are marketed as able to facilitate the development of various cognitive (认知的) skills such as language. An academic journal recently published a study that focused on one product, the Baby Wordsworth, from the Walt Disney Company's Baby Einstein series. The study put the DVD to the test with a group of one- and two-year-olds. For six weeks, 88 children were randomly (随机地) assigned to either watching it a few times a week or not at all. Researchers then tested the language skills in each group based on how many words the children knew. At the end of the period, children in both groups understood about 20 of the 30 words highlighted in the DVD, on average. The researchers also asked parents about their children's television viewing before entering the study. The earlier a child started watching Baby Einstein DVDs, it turned out, the smaller his or her vocabulary was. The study's finding is in line with some earlier research, says Rebekah Richert, a researcher at the University of California, who led the study, but it is unclear if the DVDs themselves are responsible. "Parents who place their kids in front of the screen could be trying to remedy slow language development, or they could be using the DVDs as baby sitters, cutting back on social stimulation." "A lot of children seem to have these kinds of DVDs," Richert says. "My take-home message would be to encourage live interaction between parent and child." Although it is not well understood how watching television affects language, Richert and his colleagues wrote in their report, the American Academy of Pediatrics (儿科) recommends that children younger than two stay away from the screen. The Baby Einstein Company emphasized that it "does not claim educational outcomes." On its web page, it notes that its products "are not designed to make babies smarter but to engage them." The company notes that it disagrees with the recommendation from the American Academy of Pediatrics. "When used properly," the company writes, "appropriate video content can be a useful tool for parents and little ones to enjoy together."1. Researchers conducted the study with the Baby Wordsworth DVD in order to ________.A) examine the quality of the DVD from the Baby Einstein CompanyB) reveal the difference in language learning ability between babiesC) find out whether the Baby Wordsworth DVD can boost language skills D) find out how many words babies can learn from the DVD2. It can be inferred that the previous studies have suggested that ________.A) early exposure to DVDs can negatively impact language development B) watching baby videos can actually boost the children' language skillsC) baby videos are harmful to the cognitive learning of childrenD) DVDs of poor quality can not facilitate language development3. Which of the following is the possible reason given by Richert to explain the results of his study?A) Putting babies in front of educational DVDs kills their interest in language learning.B) Keeping kids watching DVDs reduces parents' verbal engagement with them. C) Children under two cannot concentrate on educational DVDs.D) Kids at an early age show no much difference in language learning.4. According to Richert, what is the most important thing for parents to do?A) Keeping infants away from the educational DVDs.B) Staying together with babies in front of the screen.C) Having more interaction with children in real life. D) Limiting the video watching time for young kids.5. What does the Baby Einstein Company say about its DVD products?A) They are helpful for the kids who have language delay.B) They are harmful to young kids without a proper use.C) They cannot help the language learning of young kids.D) They are not made to improve the intelligence of kids.