[Q]: How does the sentence end?

They decided to build it with plastic instead of metal, because the 

[A]: metal is more stiff.


[Q]: How does the sentence end?

Luke wanted to switch from taking a supplement to taking a vitamin. Because the 

[A]: supplement was old.


[Q]: How does the sentence end?

The diner cook added vegetables from the bin to the pot of soup on the stove until the 

[A]:
bin was empty.