_you are free today,I hope you can help me with my maths.1Since2F_英语解答

_you are free today,I hope you can help me with my maths.
1Since
2For
答案是1我选2 为什么?
p62

人气：134 ℃　时间：2019-10-10 06:42:08

解答

since（既然）语气较弱,强调已知的事实
for是并列连词,表示推断的原因,或对前一分句补充说明理由.