It is believed by most scientists that______.
A. the moon was hit by an object as large as Mars
B. the moon formed from pieces of rock from Mars
C. the pieces from Mars came together to form. the earth
D. the moon is made up of materials similar to those of the earth
查看答案
The purpose of the passage is to ______
A. enlarge our knowledge of the plants
B. provide latest information on plant usage
C. introduce a successful project concerning a plant
D. emphasize the importance of rare plant preservation
But for his kind help, I______this experiment so quickly.
A. shouldn't be finishing
B. couldn't finished
C. hadn't finished
D. wouldn't have finished
"Family planning programs" means_____.
A. birth control policy in a country
B. economic policy in a family
C. TV programs designed for a family
D. economic policy in a country
I______them to go by train, but they went by bus after all.
A. suggested
B. demanded
C. proposed
D. advised
微信支付 
支付宝支付