Scientists warn that El Nino _____ the world this coming summer.

I had just stepped out of the bathroom______ I heard the steps.

How do you find your trip to Hainan?-Lots of sunshine, wonderful food, and amazing nightlife,________ a great vacation[ ]

How often do you visit your grandma in the village? —-I feel ashamed______________

If no one ________ the lost bag，the person who found it can give it to the Lost and Found Department.[ ]