D
consider后面一般加动词ing形式
consider sth （to be）+名词、形容词……
变为被动就成了sth be considered （to be）+名词、形容词……
They considered a computer,which was considered a great help in their work．这里该选哪个
They considered a computer,which was considered a great help in their work．这里该选哪个
A．to buy; to be B．buying; being C．to buy; being D．buying; to be
A．to buy; to be B．buying; being C．to buy; being D．buying; to be
英语人气：442 ℃时间：2020-06-06 11:30:48
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