English
posted by rfvv .
Scientists found a great way to use flowers for cars. The oil from some flowers can make cars run. 1) It needs a special engine. 2) It uses flower oil to run cars. 3) This is a great way to save money. 4) It also makes the air clean. Now flowers can be useful in many ways.
(What does each number refer to?)
1) It
2) It
3) This 
4) It

This is interesting  having you think about antecedents for rather vague pronouns!!
1. It = flower oil
2. It  no particular antecedent that I can see
3. This = the act of using flower oil to run cars
4. It = the act of using flower oil to run cars
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