Model The room is 15 metres long The room is 15 metres (in) (length)1 The Eiffel Tower weighs about 700 tonsThe Eiffel Tower is about 700 tons( ) ( )2 He did not ask the teacher for help.He worked out the different problemHe worked out the different problem（ ）the help of the teacher3 In ancient China,people used the Great Wall to keep the enemies out of the country.In ancient China,people used the Great Wall to ( )their country from enemies4 It took t

Model The room is 15 metres long The room is 15 metres (in) (length)
1 The Eiffel Tower weighs about 700 tons
The Eiffel Tower is about 700 tons( ) ( )
2 He did not ask the teacher for help.He worked out the different problem
He worked out the different problem（ ）the help of the teacher
3 In ancient China,people used the Great Wall to keep the enemies out of the country.
In ancient China,people used the Great Wall to ( )their country from enemies
4 It took the workers ten years to build the palace
The workers ( ) ( ) the palace for ten years