单项选择题
The largest city in Australia is _____.
- A．Alaska
B．Sydney
C．Canberra
D．Perth
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单项选择题
Romanticism as a literary movement came into being in England early in the latter half the _____ century.
A．16th
B．17th
C．18th
D．19th -
单项选择题
On which day is Halloween celebrated
A．5 November.
B．31 October.
C．17 March.
D．25 December. -
单项选择题
It is implied in the passage that _____.
A．many industrialists feel no concern for the improvement of pollution control
B．breathing low concentrations of urban dust does not necessarily sicken or kill people
C．no acceptable biological mechanism has been suggested to explain the toxicity of low concentration of urban dust
D．scientists have done nothing to reveal the mystery of the toxicity of low concentration of urban dust
