I bought the train tickets at the station easily during the spring rush, though ________ of them ________ it.
After completing and signing it, please return the form to us in the envelope __________.
The witnesses __________ by the police just now gave very different descriptions of the fight.
In some languages, 100 words make up half of all words __________ in daily conversations.
It was not until midnight __________ they reached the camp site.
We finished the run in less than half the time __________.