单项选择题
A．Dangerous Sports--What and Why B．The Boredom of Modem Life C．Bungee Jumping--Is It Really Dangerous D．The Need for Excitement
33（）A．necessaryB．wonderfulC．importantD．harmful
单项选择题33（）
A．necessary B．wonderful C．important D．harmful
In bungee jumping, you （）A．jump as high as you canB．sli...
单项选择题In bungee jumping, you （）
A．jump as high as you can B．slide down a rope to the ground C．attach yourself to a rope and fall to the ground D．fall towards the ground without a rope
How do all food chains break（）A．One kind of animals is ...
单项选择题How do all food chains break（）
A．One kind of animals is eaten up. B．One kind of plants is destroyed. C．One kind of animals eats another. D．One of the links is destroyed.
