Unit 1 Life on Mars-

the fishing village developed into a town.
he has developed the habit of getting up early.
the pioneers are developing the waste land.
develop natural resources/ solar energy
the photo will look nice when they are developed.
培養興趣
___________________ _____________________
3. however, nobody is not sure if these plants can produce enough water.（l.14-15）
be sure of/ about 確信
are you sure of/ about his coming in time?
be sure to do  一定會，一定要
she is sure to find out the truth tonight.
make sure（of）確保
he arrived at the cinema early to make sure of a seat.
 
paragraph 4: gravity
1. the gravity on mars is only about three-eighths of the gravity on earth.（l.16）
分數的表達方法： 分子用基數，分母用序數；分子大于一分母加“s”
三分之一
one third    one out of three
九分之二
two ninths
百分數  
percent/  per cent
我們年級有五分之一的學生來自其他城市。
one fifth of the students in our grade are from other cities.
70%的水來自于海洋。
70 percent of the water is from sea.
2. to prevent this, humans on mars have to wear special boots to make themselves heavier.（l.19-20）
prevent （vt.及物動詞）防止，預防
prevent diseases
使……不做某事，阻止……做某事
prevent sb. from doing sth.
姚明的腿受傷了。這使他不能打籃球。
yao ming’s leg is hurt. this prevents him from playing basketball.
 
paragraph 5: life
compared with life on earth, life on mars will be better in many ways.（l.23）
1. 過去分詞作狀語。過去分詞與主句的主語是動賓關系，即過去分詞與主語是被動關系。
（1）the teacher came into classroom into the lab, followed by some students.   
句意為：老師進入教室，后面跟了一些學生。
teacher 與followed 形成被動關系                     
（2）given a chance, i can surprise the world.
鞏固練習:
（1）____in the mountains for a week, the two students were finally saved by the local police.
a. having lost      b. lost         c. being lost       d. losing
（2）the flowers his friend gave him will die unless（除非）______ every day.（四川高考）
a. watered       b. watering         c. water         d. to water
2. in many ways    在很多方面
by the way  順便問一下
make one’s way  排除困難前進
in one’s way 礙事，妨礙
on one’s way 在去……的路上