[Q]: How does the sentence end?

The dictator gained power of the other country by using tanks rather than the planes because the 

[A]: tanks were advanced.


[Q]: How does the sentence end?

The man tried to bring his trombone into the school but the 

[A]: trombone was too large.


[Q]: How does the sentence end?

Brian put Lawrence in charge of preparing the baby's bottle, because 

[A]:
Lawrence knew how to do it.