PREP You use of to combine two nouns, or a noun and a present participle, when the second noun or present participle defines or gives more information about the fir...
By the time he arrives in Beljig, we_here for two days. A. will have stayed B have been staying C shall stayD. have stayed 为什么选A而不是选D希望大家拿能给予一些建议(本人英语初学者,莫要过于...