A、Qingling Mountain
B、Huangshan Mountain
C、Huashan Mountain
D、Tianshan Mountain
第5题
(During) the early stages of the industrial revolution, perhaps (one in every seven) (deaths) in Europe' s (crowded cities) was caused by tuberculosis.
A.During
B.one in every seven
C.deaths
D.crowded cities
第6题
A.one day
B.ten days
C.seven days
D.six days
第7题
In fact, one bacterium can grow very quickly even just within seven hours.
A.Y
B.N
C.NG
第8题
The Voice is printed__________days a week.
A. one
B. two
C. five
D. seven
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