单项选择题A．Some incidents had demonstrated its security problem.B．The Royal family found it necessary to do so.C．The House of Parliament proposed to do so.D．The European Union suggested it doing so.

单项选择题A．nostrils determine nose sizeB．the size of nostrils can change in one’s lifeC．big nostrils help people tell different smellsD．size of nostrils may be a cause of smell problems

单项选择题A．They spend most time playing.B．They spend most time studying.C．They try to learn how to get along with other kids.D．They go on tours of various universities.

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单项选择题A．athletic talentsB．extremely smart mindsC．musical giftsD．strong scientific interest