后半句是条件从句.
for 这里的意思是 '因为',如:
I was late,for I was stuck in traffic.我迟到了,因为堵车.
这里说 'will come' (B) 是因为他来不来吃饭还没有发生,不是现在的事,是以后会(或不会)发生的事,所以是 B.
清楚了吗?
I think it is necessary for my 19-year-old son to have his o
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