When our ancestors were hunters and gatherers 10,000 years ago, they didn’t have time to wonder much about ________ but finding food.
When such an organized group became too large for its members to travel together comfortably, it would__________.
______ is no _______ arguing with Bill because he will never change his mind.
---What caused the party to be put off? ---_____________ the invitations.
We can’t walk there. _________, we must find a taxi.
I feel so excited! At this time tomorrow, I ________ by camel with local guides in Northern Africa.