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單項選擇題

Before I got to the cinema, the film（）

A.had begun
B.has begun
C.is begun
D.was beginning

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單項選擇題

The play（）already（）when we got to the theatre.

A.has;tarted
B.was;tarted
C.have;started
D.had;started

單項選擇題

Before she began to study at Beijing University, she（）in a factory for five years.

A.had worked
B.worked
C.has worked
D.would work