441. you haven’t done your duty well enough.你沒有盡到你的責(zé)任。

442. we will not only study english, but also study japanese next term下學(xué)期我們不僅學(xué)英語，還要學(xué)日語。.

443. it’s necessary to attend each other’s lectures.相互聽課很有必要。

444. we often teach and learn from one another.我們經(jīng)?；突W(xué)。

445. at the end of the term, the teachers are checked up.學(xué)期結(jié)束時，老師們要接受檢查。

446. my teacher has many resources(materials) on(for) teaching.我的老師有很多教學(xué)資料。

447. you’re to make-up study on english now.現(xiàn)在你們要補(bǔ)學(xué)英語。

448. our examination system isn’t still wonderful now.我們現(xiàn)在的考試制度還不是很完美。

449. you’d better form the habit of studying.大家最好養(yǎng)成學(xué)習(xí)的好習(xí)慣。

450. no smoking here.這里嚴(yán)禁吸煙。

451. smoking is harmful to your health.吸煙有害健康。

452. a foreign language is a useful weapon in economic struggle.外語是一種經(jīng)濟(jì)斗爭的有力武器。

453. he never lose heart(lost hope).他從不失去信心。

454. he went on fighting until the victory was got.他仍在奮斗，直到取得勝利。

455. we still need to move on.我們還是要堅持前進(jìn)。

456. stop living in the past.不要總是生活在過去的陰影里。

457. he gave his life to the cause of revolutionary. 他為革命事業(yè)獻(xiàn)出了自己的一生。

458. we must fight for the aftertime(future) of our motherland.我們一定要為我們祖國的未來而奮斗。

459. the people helped each other in their fight against the flood.大家齊心協(xié)力，與洪水展開決戰(zhàn)。

460. i will be pride of you when you take great contribute for the society.你們能對社會做出偉大貢獻(xiàn)，我也會很自豪。