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1/
a. New York is the biggest City in the USA, but not the Capital.
b. English is an official language in Malaysia, India, and many other countries.
c. The number of English speakers in the world is increasing fast.
d. London is the Capital of England, whereas Edinburgh is the Capital of Scotland.
2/
a. He said that he had decided to become an astronomer.
b. Hoa asked Thanh to lend her his iPad for a few minutes.