Where is your father—He Hongkong. He Hongkong for three days.

Imagine a situation_____two strangers are talking to each other.

When you are in trouble, you may _______ your teacher and classmates for help.

They were walking along the shore _______ a huge wave appeared out of nowhere, sweeping them out to sea.[ ]

Had the US Airways captain not guided his jet to a safe landing on the Hudson River, just west of New York, over 100 people aboard ______, along with many more on the ground.