A．These factories produced machines in the past.B．These factories produced farm tools
A. These factories produced machines in the past.
B. These factories produced farm tools in the past.
C. These factories manufactured bicycles in the past.
D. These factories manufactured cars tools in the past.
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A．Lightning and thunder.B．A great deal of water vapor and a rapidly rising air current
A. Lightning and thunder.
B. A great deal of water vapor and a rapidly rising air current.
C. Warm air and cold air.
D. A great amount of vapor and electricity.
A．From the ones they are familiar with to the difficult ones.B．From the short ones to
A. From the ones they are familiar with to the difficult ones.
B. From the short ones to the long ones.
C. From the long ones to the short ones.
D. From the ones they are confident of to the more difficult ones.
A．She is going to stay at home.B．She is going to fix the telephone.C．She is going to c
A. She is going to stay at home.
B. She is going to fix the telephone.
C. She is going to call the telephone company.
D. She is going to work in the telephone company.
When owners are unhappy at their animals' behaviors, they______.
A. tend to misunderstand their normal behaviors as abnormal ones
B. take mild punishments instead of severe ones
C. always improve their animals' behaviors
D. do something to encourage their animals
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