A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.
Please leave your phone number ______ we can get in touch with you in case of emergency.
They demanded that the books ______ to the school library right away.
The trade union intended to call on the workers to go on strike ______ the government’s limitation on exports.
By the time you come back, your aunt ______ for Nanjing to attend a meeting.
______ frightened us ______ a tiger turned up suddenly in front of us.