单项选择题
It is very difficult to get from one place to another in Tokyo because（）
A．the city is so large and so high B．there is no traffic C．we don’t know the road D．the city is so large and the traffic is so heavy
单项选择题 The man showed the boy （）he should play the piano.
单项选择题 Dinosaur scientists can get information directly by （）
单项选择题 According to the passage, "Flores Human"（）
