单项选择题

A．They should help maintain the equipment.
B．They should teach their children how to use the equipment.
C．They should stop their children from climbing ladders.
D．They should keep a watchful eye on their children.
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单项选择题
A．On a busy street.B．In a Hong Kong hotel.C．At an airport.D．At a booking office.
A．On a busy street.
B．In a Hong Kong hotel.
C．At an airport.
D．At a booking office.
单项选择题
A．The man had placed them in their car.B．The man had forgotten to bring them.C．The woman had lent them to the hotel owner.D．The woman had left them next to the picnic table.
A．The man had placed them in their car.
B．The man had forgotten to bring them.
C．The woman had lent them to the hotel owner.
D．The woman had left them next to the picnic table.
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