Input: Continue writing.

Although to determine whether the emu is sick or healthy is quite hard, it can be spotted by observing the weight, the 
OPTIONS:
- healthy emu is quite heavy.
- sick emu is quite heavy.

Continued: healthy emu is quite heavy.


Input: Continue writing.

The stamps were worth more than the coins were worth because the 
OPTIONS:
- coins in the collection were real.
- stamps in the collection were real.

Continued: stamps in the collection were real.


Input: Continue writing.

We needed to return the book we barrowed from the library, but the 
OPTIONS:
- library was not open.
- book was not open.

Continued: library was not open.


Input: Continue writing.

The computer was stumped by the algorithm but solved the equation with ease, as the 
OPTIONS:
- algorithm was so complex.
- equation was so complex.

Continued:
algorithm was so complex.