You are asked to remain _____ with safety belts fastened and with seats in an upright positionA seatingB seated C to seat D to be seated为什么选B,句子什么意思

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You are asked to remain _____ with safety belts fastened and with seats in an upright positionA seatingB seated C to seat D to be seated为什么选B,句子什么意思
You are asked to remain _____ with safety belts fastened and with seats in an upright position
A seating
B seated
C to seat
D to be seated
为什么选B,句子什么意思

You are asked to remain _____ with safety belts fastened and with seats in an upright positionA seatingB seated C to seat D to be seated为什么选B,句子什么意思
remain后接 名词 形容词 to do 结构
这里原来就是坐着的,保持坐着,不可用to do结构,to do在动作之前没有发生的情况用.
句子意思
请自觉坐在座位上,座位保持竖直并系好安全带.

remian 相当于动车be
be seated
be seated 意思为 坐下,就座
seated ['si:tid] adj. 坐着的
故选择B

你们被要求系紧安全带坐好
SEATED 表示一种状态

remain 接系表结构
seated 是形容词