I wonder______ it is worth doing 填that 还是if

I wonder______ it is worth doing 填that 还是if If a thing is worth doing it isworth doing well the question is（ that if ）it is worth doing that if 为什么不能用在这 It‘s uncertain () the experiment is worth doing. A.if B.that 英语选择和填空The questions is A whether is it worth doing B that i If a thing is worth doing,it is worth doing well.是谁说的? If a thing is worth doing ,it is worth doing well.什么意思 If a thing is worth doing it is worth doing well it is worth of doing xxx 还是 it is worth doingxxx 怎么我看见有worth What I think is worth pointing out is that if I expect it to If a job is worth doing,it's worth doing well翻译成中文谚语是什么? it is (well/very) worth doing 填哪一个 为什么