Listen! Is Mary playing the piano in the room? –No. It ________ be Mary. She has gone to Hong Kong.

My friend _______ well in English , so she often helps me with my projects .

If you are in the zoo, remember not to touch or go near the animals. Although some of the animals are cute, you _________ leave them alone.

Why are you worried?I’m expecting a call from my daughter. She ______ New York for three years.

He thinks watching movies ________.