Work hard __________ you will succeed .
-Could you tell me ________ this summer holiday? -Tibet.
This is Tony's _______ visit to Jinan. He has been here once before.
--- Would you please take this workbook to the teacher's office for me? — ________.
It is a world of flowers in spring in Dongying.You can see flowers______
—The meeting _______ because of the fog in Northern China last week. — Oh, it’s too bad! We should take action to improve the air quality.