21 事實(shí)上，多數(shù)交通事故是可以避免的。avoid
22 詹妮累了，但還是繼續(xù)工作。keep on doing
23 一班的學(xué)生們總是保持教師的干凈整潔。keep … adj.
24 有些動物即使在很冷的天氣也能保持正常的體溫。keep up
25 請記住離開教室時一定要關(guān)燈。turn off
26 到你的房間去找一找。look for
27 我認(rèn)為每天花一兩個小時進(jìn)行體育鍛煉是很重要的。spend in doing sth.
28 考試前仔細(xì)讀讀你的筆記。look through
29 父母希望你長大或當(dāng)一名醫(yī)生。grow up
30 桌子是用木頭做的。be made of
翻譯：
21 In fact, most traffic accidents can be avoided.
22 Jane was tried but she kept on working.
23 The students of Class One always keep the classroom clean and tidy.
24 Some animals keep up their normal body temperature even in very cold weather.
25 Remember to turn off the lights when you leave the classroom, please.
26 Go and look for it in your room.
27 I think it very important for people to spend one or two hours doing physical exercises every day.
28 Look through your notes before the exam.
29 Your parents hope you will be a doctor when you grow up.
30 The table is made of wood.