The little girl is walking along the beach, happy and joyful, ________ bending down to pick up a beautiful seashell.

_____ I had done it I knew I had made a mistake.

The director added a few characters and changed some names in this movie but _______ this is a true story.

When you drive home, you can’t be＿＿＿＿＿＿＿careful. 

--- The earthquake last night was really terrible. --- ______, no people were injured or killed, and they escaped in time.