[ Tenses ]
She said she felt tired as she _______________ for five hours.
A. had been working
B. has worked
C. worked
D. has been working

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Vocabulary › ViewThe Great Wall of China is one of the most famous _________ in the world.
A. tourist attractions
B. sound
C. tour
D. continent
Grammar › View
This is ________ a great book. Would you like to borrow it?
A. so
B. such
C. so much