Choose the correct option.

1. Never step on a ... . It brings bad luck. 2. Has a ... just landed on your hand? Lucky you! 3. Oh, no, a broken ... ! This means seven years of bad luck. 4. Look! A ... star. Make a wish, quickly! 5. Why are you walking under this ... ? Do you want to have bad luck? 6. We're so lucky! We've just seen a ... and it's not even raining!