单项选择题

A． He went to a special school.
B． He was trained by his own family.
C． He was trained by his employers.
D． He had been a sitter before he became a nanny.
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单项选择题
A． a condition that interferes with a person’s ability to sleep normallyB． stopping breathing for short periodsC． difficulty either falling asleep or staying asleepD． sudden attacks of deep sleep
A． a condition that interferes with a person’s ability to sleep normally
B． stopping breathing for short periods
C． difficulty either falling asleep or staying asleep
D． sudden attacks of deep sleep
填空题
concrete buildings
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