单项选择题

______ in the United States, St. Louis has now become the 24th largest city.

A．Being the fourth biggest city
B．It was once the fourth biggest city
C．Once the fourth biggest city
D．The fourth biggest city it was

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单项选择题

We couldn' t really afford to buy a house so we got it on hire purchase and paid monthly______

A．investments
B．requirements
C．arrangements
D．installments

单项选择题

All the tasks ______ ahead of time, they decided to go on holiday for a week.

A．been fulfilled
B．having been fulfilled
C．were fulfilled
D．had been fulfilled

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