In some places, red indicates sadness, as in South Africa, _______ it is the color people wear when they mourn.
Many students listened to the lecture, but I wondered how much they .
The customs office is your luggage is inspected when you enter or leave a country.
We are proud of our hometown, which is in coal and natural crystal(水晶石).
However much you have done, you ought to the help you’ve received from others.
The girls in the photograph are twins, is my classmate in high school.