Answer:
Comparatives with "as...as" are used to show that two things are equal in some way. You can use the structure as follows: (as + adjective/adverb + as). Here are the comparisons using the list you've provided:
5. The lemon is as sweet as the orange.
6. The morning is as warm as the afternoon.
7. The robin is as big as the eagle.
8. My neighbor is as friendly as yours.
9. The tiger is as dangerous as the lion.
10. The bicycle is as expensive as the motorcycle.
11. The house is as tall as the skyscraper.
12. France is as beautiful as Switzerland.
It's important to remember that the meaning behind these sentences is that the two things being compared are equal in the way that is specified. For example, "The lemon is as sweet as the orange" means that the sweetness of the lemon and the orange are equal. However, this might not be true in reality—it's just an example of how to use the structure.