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B.an
C.the
D./ 2.After listening to the ________ to the Flower Sea, we become more interested in this place.
A.influence
B.instrument
C.introduction
D.instruction 3.The Chinese Communist Party was founded ________ July, 1921.
A.on
B.in
C.at
D.to 4.It’s known to all that the Chinese are famous for ________ hard work and wisdom.
A.they
B.them
C.their
D.themselves 5.The air in Yancheng is much ________ than any other city in Jiangsu Province.
A.nice
B.nicer
C.nicest
D.the nicest 6.If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day.
A.can’t
B.mustn’t
C.needn’t
D.shouldn’t 7.Online learning ________ very popular with students since last year
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