—Was it there _______ you were away to answer the phone?—There is no doubt about it.
Many facts proved that long before Columbus ________ America, Chinese had visited it.
Tom is good boy and _______ he is honest. He never tells a lie.
_______ the normal condition, he can read 150 words a minute.
Hearing the sound of shots, the birds flew away ______ all directions.
——How is it that you are late for class again? ——________.