This sign warns（)ahead.A.people the dangerB.people of the dangerC.people about the dange

This morning the boy was still vivid, but now he suddenly burned （) with no warning.A

Dietary intervention may work even after precancerous warning signs have appeared.A．RightB

The purpose of this passage is likely to______.A．warn people about the effects of carbon e

When can the volunteers sign up for the teaching program this week？A．On Tuesday and Thursd

What does this passage want to tell us？A．Warn young people of the hardships that a success

The author s purpose in writing this passage is to______.A．warn people not to celebrate Ha