[Q]: How does the sentence end?

Michael asked Derrick if he knows how to trademark a name, but 

[A]: Derrick doesn't know.


[Q]: How does the sentence end?

David finished his pasta while Mark couldn't finish his lasagna, because the 

[A]: pasta portion was smaller.


[Q]: How does the sentence end?

John decided he will read the magazine first because the bus will soon arrive and then read the book in the long journey. The 

[A]:
book is long.