A．It costs nothing to enter the room.B．Visitors can only visit it on weekends.C．Visito
A. It costs nothing to enter the room.
B. Visitors can only visit it on weekends.
C. Visitors can go into any room inside.
D. Everyone has the right to visit the White House.
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A．By different gestures.B．By different voices.C．By different colors.D．By different cos
A. By different gestures.
By different voices.
C. By different colors.
D. By different costumes.
【B18】
A. even
B. alike
C. ever
D. also
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.
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.
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