I.单项选择（20分）
1. ____ youngest leader in China is ____ man called Lu Hao．
A．The；a B．A；the C．A；a D．An；all
2. I had a very unusual ____ yes terday. I saw a UFO land in front of me.
A. decision B. test C. friend D. experience
3. I don’t like to keep pets because they are ____ .
A. friendly B. dirty C. clever D. interesting
4.一John，is Henry your twin brother?
—Oh，yes．He is twenty minutes ____ than me．
A．heavier B．elder C．taller D．older
