- ______ exercising, and you'll be healthier.
It’s__________ unusual thing for ________ eight-year-old girl to find ________ UFO.
——My diamond necklace has gone missing. It’s my favourite present from my mother.——_________.
Can you tell me ______the truth?
——Where is your father? I’m looking for him everywhere.——He______ my grandmother surfing the Internet on the second floor.
The surface of Mars is ______like the surface of Earth than_____ planet in our solar system (太阳系).