单项选择题
A．lifted B．raised C．rose D．under water
30（）A．wayB．senseC．directionD．position
单项选择题30（）
A．way B．sense C．direction D．position
We drop a piece of metal into a jar full of water, the ...
单项选择题We drop a piece of metal into a jar full of water, the metal will float if it weighs less than （）
A．an equal amount of silver B．an equal amount of gold C．all the water in the jar now D．the water that leaves the jar
In many modern countries, children go to school （）A．be ...
单项选择题In many modern countries, children go to school （）
A．be free education B．to be able to marry C．to work for society D．to rid themselves of "low" work
