— Hi, Jack, you look so tired.
—I’m tired. I the kitchen all day.
A. painted B. had painted
C. have been painting D. was painting
（2015·浙江）Albert Einstein was born in 1879. As a child, few people guessed that he a famous scientist whose theories would change the world.
A. has been B. had been
C. was going to be D. was
________ you’ve heard the song, you’ll never forget it.
A. At once B. Once more
C. Once upon a time D. Once
These old buildings possibly _________ the Ming Dynasty.
A. date back to B. dated back to
C. dated from D. date in
He did attend the lecture this morning, but he seemed to know little about it.
A. somehow B. surely
C. naturally D. sadly
John had planned to make a compromise, but________he changed his mind at the last minute?
A. anyhow B. otherwise
C. therefore D. somehow
