[Q]: How does the sentence end?

James tried cutting the box with a blade but he failed, so he used a knife and it was a success. It appeared the 
OPTIONS:
- blade is sharp.
- knife is sharp.

[A]: knife is sharp.


[Q]: How does the sentence end?

After Erin put a scarf on her neck, Katrina noticed how pretty it was. 
OPTIONS:
- Erin asked to try it on.
- Katrina asked to try it on.

[A]: Katrina asked to try it on.


[Q]: How does the sentence end?

Rebecca asked Katrina how the Channel Islands were for a vacation because 
OPTIONS:
- Rebecca had visited a lot before.
- Katrina had visited a lot before.

[A]:
Katrina had visited a lot before.