unit 17 laughter period three grammar 課時(shí)精練（北師大版選修6課標(biāo)通用）-全文預(yù)覽
【正文】 her homework yet as she________her mother in the kitchen the whole morning. A． has been helping B． was helped C． would be helping D． helps 答案 A [解釋同 9題。 ] 7． I first met Li Na 5 years a foreign pany then. A． had worked B． has worked C． was working D． had been working 答案 C [過(guò)去那個(gè)時(shí)候正在做某事 用過(guò)去進(jìn)行時(shí)。 ] 3． Joseph________his lessons for a short while when his little brother interrupted him. A． had reviewed B． would be reviewing C． had been reviewing D． was reviewing 答案 C [同上。 ] 2． Their football game was interrupted； they________for about 15 minutes when it started to rain. A． had bee
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