There is no doubt people ought to struggle against pollution. [ ] A．thatB．whethe
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There is no doubt ________ people ought to struggle against pollution.
[]
A．thatB．whetherC．ifD．what
试题答案
答案：A
There is no doubt ________ people ought to struggle against pollution.
[]
A．thatB．whetherC．ifD．what
答案：A