单项选择题

The phrase "homes in on its target" (Sentence 1, Para. 1) in the context means ______.

A．find its way to the intended victim
B．move towards the prey
C．set off for the target
D．aim at the victim
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单项选择题
The author's attitude to the best way to avoid being bitten is ______.
A．positive
B．negative
C．worried
D．indifferent
单项选择题
The main idea of the passage is that ______.
A．mosquitoes fly close to the ground
B．repellents stop the mosquito from biting its prey
C．scientists at Sussex have discovered the best way to avoid being bitten by the mosquito
D．scientists discovered a lot about how a mosquito finds its prey and some ways to prevent it from reaching it
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