7 The amount of water your body needs per day is closely related____________
From the passage, we can conclude that ______.
A.all trees give off the same amount of water into the air
B.the larger a tree is, the less water it will give off into the air
C.different kinds of trees give off different amount of water into the air
D.trees of the same kind give off different amount of water into the air
Where can the listeners see the wate pipes?
A.On a hillside.
B.Inside a pavilion.
C.At the gateway.
D.Under a dome.
—Where is your father? —He ______ flowers in the garden.
A.waters
B.must water
C.must be watering
D.must have watered
A.Drying the food.
B.Heating the food.
C.Cooling the food.
D.Putting the food in the water.
A.He jumped into the river immediately.
B.He took off his coat and jumped into the water.
C.He dashed down the bridge to save the boy.
D.He shouted out for help.
What had probably caused such high casualties in the big fire?
A.No fire-fighters.
B.No water.
C.Explosions.
D.Overcrowding of habitants.
Before starting an air compressor, It should be _____.
A.unloaded
B.primed
C.filled with water
D.greased
If a small electric motor is immersed in salt water, it should be ()
A.washed in fesh water
B.dried in an oven
C.A and B
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