单项选择题

A．Leisure sporting activities.
B．Average age of athletes.
C．Durability of sporting equipment.
D．Friday’s business meeting.
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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
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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