问题

I’d like to start my own business next year – that’s __________ I will face my big challenge in life.

A:why
B:when
C:which
D:what

正确答案是：

同类题型

If _____ the same treatment again, he is sure to get well [ ]

158. It is said in the book that ThomasEdison _____ the world leading inventor for about sixty years.

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heard wolves howling in the forest,Lala her walk up the path to the caves fearingthat there might be wild beasts lying in wait for her．