I’m sorry to have kept you ________ for a long time. A. wait b. to wait c. waiting D. to be waiting
It was not _____ she took off her dark glassed ___ I realized she was a wellknown actress.
Not until the early years of the 19th century____ what heat is.
The last time we had great fun was _____we were visiting the Water Park.
It was along the Mississippi River ____Mark Twain spent much of his childhood.
_____ their hats into the air, the fans of the winning team let out loud shouts of victory.