问题描述:
I don't know ----- there is any danger in this type of plane.填if 还是that.
我明天就要考试,还有能讲一下I don 't know 后跟that 和if的区别吗,我们老师讲的云里雾里的
我明天就要考试,还有能讲一下I don 't know 后跟that 和if的区别吗,我们老师讲的云里雾里的
问题解答:
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