单项选择题


A．to appear
B．appearing
C．appeared
D．appear
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单项选择题
A．attractedB．drewC．causedD．pulled
A．attracted
B．drew
C．caused
D．pulled
单项选择题
What will be crucial to the economy of the cities in the twenty-first century A) Services. C) Telecommunications. B) Intellectual property. D) both A and B.
A．What will be crucial to the economy of the cities in the twenty-first century
B．Services.
C．Intellectual property.
D．Telecommunications.
E．both A and B.
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