1.A healthy and better-educated new generation is a guarantee for sustainable economic and social development of our country.
　　 2.The victory of Chinese women’s volleyball team at the Olympic Games was a great inspiration to all Chinese people.
　　 3.The ability to take part in space exploration represents the level of a nation’s scientific and economic development.
　　 4.Many students find giving an effective oral presentation difficult and stressful.
　　 5.Juvenile delinquency, one of the most controversial issues throughout the world, has attracted a lot of attention from both the social scientists and the general public.
　　 6.In the past three decades, many countries have formulated laws and regulations to protect animals from being abused or killed, and many have set up reservation areas to protect endangered animals.
　　 7.Without proper rewards, those who have done good deeds may sometimes feel disappointed and many others will simply shy away from doing good deeds.
　　 8.Some people may be addicted to netsurfing, which impairs their physical and mental health.
　　 9.Lakes and rivers are becoming seriously polluted, which aggravates (worsens) the shortage of fresh water.
　　 10.Whether you plan to stay for a week or for a year in a new place, you will benefit from learning about the place before you go.
　　 1。健康的、受過(guò)良好教育的一代新人是我國(guó)經(jīng)濟(jì)、社會(huì)可持續(xù)發(fā)展的保障。
　　 2。中國(guó)女排在奧運(yùn)會(huì)上所取得的勝利極大地鼓舞了中國(guó)人民。
　　 3。參與太空探索的能力代表了一個(gè)國(guó)家的科技和經(jīng)濟(jì)發(fā)展的水平。
　　 4。很多學(xué)生覺(jué)得有效的口頭表達(dá)困難而緊張。
　　 5。青少年犯罪是當(dāng)今世界頗有爭(zhēng)議的問(wèn)題之一，吸引了社會(huì)學(xué)者和普通公眾的廣泛注意。
　　 6。過(guò)去的三十年中，許多國(guó)家都制定了法律和法規(guī)，保護(hù)動(dòng)物免遭虐待或屠殺，還有許多國(guó)家建立了保護(hù)地，保護(hù)瀕臨滅絕的動(dòng)物。
　　 7。沒(méi)有適當(dāng)?shù)幕貓?bào)，那些做了好事的人有時(shí)會(huì)覺(jué)得失望，而許多其他的人則干脆不愿做好事。
　　 8。有些人沉迷于網(wǎng)上沖浪，這對(duì)他們的身心健康有害。
　　 9。湖泊河流正在被嚴(yán)重污染，這使淡水的短缺變得愈加嚴(yán)重。
　　 10。在一個(gè)新地方無(wú)論是呆一周還是呆一年，去之前了解一些當(dāng)?shù)氐那闆r肯定有益。