单选题
My grandfather would sit for hours
on end
staring out of the window at the mountains.
A、
before nightfall
B、
continued
C、
without a break
D、
outside
【正确答案】
B
【答案解析】
before nightfall:天黑之前;continued:继续的;without a break:不间断地;outside:在外面的。题中“on end”意为“继续”,可知B选项符合题意。
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