Title: Tsunami Sirens. Sentence 1: Bob heard the emergency sirens. Sentence 2: The sirens indicated a tsunami might be headed for his coastal city. Sentence 3: He was driving, so he stayed in his car and headed to higher ground. Sentence 4: He drove several miles inland. Choices: a. A trip to the vet's office revealed a herniated disc. b. Bob then heard the sirens indicating that the danger had passed.
b