______ the assignment said above, you have to write a 200-word composition on environment pollution.
from Beijing to London!
——_____was the Nanjing-Changjiang Bridge open to traffic? ——It was open to traffic in 1968.
_____writer is better known in China, Charles Dickens or Mark Twain?
Shall we stay at home or_____to the park?
——Do you think the question easy or not? ——_____ .