It was not until she had arrived home _______ her appointment with the doctor.

These new types of energy from the sun, wind and water cost very little and will never ________.

You won the first prize in the physics contest! — ________ ! I made several terriblemistakes .

Which sport are you in at the school sports meeting –No decision yet. I think it ______after discussing with my PE teacher, Mr. Yuan.

The city in Shandong has become famous__________kites.