[Q]: How does the sentence end?

Cathy was at the train station because she was waiting for her friend. But the 

[A]: train  arrived.


[Q]: How does the sentence end?

James can never know what was written on the envelope in the box because just the 

[A]: box is visible.


[Q]: How does the sentence end?

The boy tried lots of different medicines to cure his pimples but the 

[A]:
pimples were too strong.