16.They collected some valuable stamps___ they stayed in Sha

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16.They collected some valuable stamps___ they stayed in Shanghai
A.while B.as C.since D.during
麻烦帮看一下,B项为什么不正确,帮分析一下,
17.I didn't manage to do it______ you had explained how
A.until B.unless C.when D.before

第一题应该选A,
As 翻译是：就像,好比..和题意不符.
第二题可以选B或者D,题出的有漏洞.你可以去问出题的人.
意思是,如果你不解释怎样做的话,我之前就没有计划去做.

16.They collected some valuable stamps___ they stayed in Sha They stayed in Beijing for two years. They collected some wood to ----- (点火)for cooking.根据所给中文填空 they stayed in the house until the last moment. when they arrived there ,they found some foreigner (shop)in in some ways they both ____________ ___________ They collected eggs (on the farm).(对划线部分提问) They have collected stamps since 1986.改为被动语态 They have stayed with host families in Beijing for a week They stayed in Beijing for 50 years.提问for 50 years they stayed in a small_后特透后特透是译音,可以填什么英语单词英语改否定句,一般疑问句急Tom did his homework yeseterday They stayed in