took Sam half an hour to send these qictures by e-mail.Sam＿half an hour ＿ these pictures by e-mail.保持原句意思不变
问题描述：
took Sam half an hour to send these qictures by e-mail.
Sam＿half an hour ＿ these pictures by e-mail.保持原句意思不变
答
1。spent 2。sending
这里on省略，如果第2个空填on，意思不通顺。
答
spent on
答
spent on on一般可以省略cost 要物做主语 sth.cost sb .some money 意为某物花费了多少钱 spend 要人做主语 sb.spend some money on sth.或 sb.spend some time doning sth.take 有固定句型 It takes sb.some time t...
答
苏珊等邮票等了1个半小时