Until recently historians assumed thatcalendars ________ with the advent of agriculture.

– We really enjoyed ourselves at theparty. Thanks again, Mr. and Mrs. Smith.— ________. Just drop in whenever youfeel like it.

How do you study for a test—__________.

_____, this physics problem seemedsimple, but when I tried to work it out, I just couldn’t[ ]

I rushed for the door , fell _______ the cat in the hallway and a tooth fell ________.