题目内容
8. The solar system is a small part of our (星系) .
8. galaxy
5. on,Mars,discovered,have,they,life(连词成句)
?
( ) 2. Have you decided whether to go there or not?
—No，I haven’t decided .
A. already B. just
C. ever D. yet
2. Have you washed the clothes?(作肯定回答)
( ) 1. There is no life on sun or on Mars.
A. the; the B. the; /
C. a; a D. a; the
3. The sun is at the heart of the solar system and 8 (行星) go around the sun.
5.无法想象宇宙有多大。
It is to imagine the universe is.
1. Have you finished (read) the book, Bob?
( ) 7. You haven’t cleaned your bedroom .
A. already B. yet
C. ever D. never
