Which of the following statements about the United Kingdom is true（）
A. The United Kingdom is a sovereign country made up of four different nations
B. England, Scotland and Wales all lie within the same island called Great Britain
C. Northern Ireland is located within the island of Ireland
D. All of the other three choices are correct
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Don't wait for me. I___ a few minutes late（）
A. can have been or
B. might be
C. can be
D. might have been
Watch this, Mum; I_stand on one leg（）
A. may
B. am able to
C. will
D. can
Until a recent study stated otherwise, it was widely believed that on average, a wild monkey ______ a week, slept 50 hours a week and mated thrice a year（）
A. eats 10 bananas a day, drinks 7 gallons of water
B. ate 10 bananas a day, drinks 7 gallons of water
C. eats 10 bananas a day but drinks 7 gallons of water
D. ate 10 bananas a day, drank 7 gallons of water
I had some free time yesterday, so I ____ write a few letters（）
A. can
B. might
C. was able to
D. could
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