New technology____________to stop the students from cheating in the exam last year.A. is used B. used C. was used
Times seems __________ when we are playing computer games.
Shanghai is bigger than _____ in Jiangsu and bigger than _______ in China.
- ________ does the bridge made of steel weigh? -About 90,000 tons.
the end , my father asked me to teach French.
The boss wants to keep his shop _______ for another three hours.