[Q]: How does the sentence end?

I'm getting a dog as a pet and I'm going to buy it a bowl before a leash because the 

[A]: leash is less useful.


[Q]: How does the sentence end?

Because the 

[A]: brokerage succeeded in turning a profit, the bank went bankrupt while the brokerage prospered.


[Q]: How does the sentence end?

Emily took a long time to look at the menu, while Christine took a short time, so 

[A]:
Christine ordered first.