If you want to be a ______, you should study math hard.

—Have you heard about the airplane accident?—Yes, all of the passengers on the plane lost their___________.

------Do you know the woman who is looking____ over a patient? ------ Yes. She is one of the best ____ in our hospital.

Which of the following signs can NOT be found in a hospital?

—What’s your favorite color?---My favorite color is________.