[填空题]41)__________. But traffic experts say building more roads is a quick-fix solution that will not alleviate the traffic problem in the long run. Soaring land costs, increasing concern over social and environmental disruptions caused by road building, and the likelihood that more roads can only lead to more cars and traffic are powerful factors bearing down on a 1950s-style construction program.
42) __________. Proponents of this advanced technology say electronic detection systems, closed-circuit television, radio communication, ramp metering, variable message singing, and other smart-highway technology can now be used at a reasonable cost to improve communication between drivers and the people who monitor traffic.
Pathfinder, a Santa Monica, California-based smart-highway project in which a 14-mile stretch of the Santa Monica Freeway, making up what is called a "smart corridor", is being instrumented with buried loops in the pavement. Closed circuit television cameras survey

[填空题]41)__________. But traffic experts say building more roads is a quick-fix solution that will not alleviate the traffic problem in the long run. Soaring land costs, increasing concern over social and environmental disruptions caused by road building, and the likelihood that more roads can only lead to more cars and traffic are powerful factors bearing down on a 1950s-style construction program.
42) __________. Proponents of this advanced technology say electronic detection systems, closed-circuit television, radio communication, ramp metering, variable message singing, and other smart-highway technology can now be used at a reasonable cost to improve communication between drivers and the people who monitor traffic.
Pathfinder, a Santa Monica, California-based smart-highway project in which a 14-mile stretch of the Santa Monica Freeway, making up what is called a "smart corridor", is being instrumented with buried loops in the pavement. Closed circuit television cameras survey

[单项选择]

Experts say children can begin learning a second language in preschool, and should begin be- fore the age of ten to take advantage of young children’s natural ability to acquire language. This advantage is lost by the time most children encounter a foreign language in the classroom, in middle school or high school.
Dr, Noble Goss, an assistant professor of Spanish’ and German at Harding University in Arkansas, says, as a father of bilingual (双语的) children (My wife is Mexican), I know that not only it is easy for children m learn one or more languages, but they have an amazing way of separating them out more successfully than you would think.
If a child hears two languages early, he accepts both equally. But if given a chance to speak both, can they be fluent in both
Not everyone agrees that early childhood is the only time to start a language, however. Reeves, the chairman and founder of the Center for Performance Assessment in Denver,
A. speak both languages at home
B. acquire a language more quickly
C. be more capable as a language learner
D. spend less time on language learning