It’s time ________ an English lesson.A．having B．to have C．have D．to having 怎么选?为什么?

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• It's time _____ a.for English class b.to dinner c.have dinner d.to English class
• It’s time ________ an English lesson.A．having B．to have C．have D．to having 怎么选?为什么?
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• 1、-Have you finished your homework yet?-Not yet,I___to do it just a few minutes ago.A.get down B.set out C.set about D.set up（我感觉应该选C,可是答案给的B,为什么啊）2、A new technique ___out,the yields increased by20％.A.having working B.having been workingC.has worked D.had been worked（答案给的B 3、____all the time is the key to____progress in EnglishA.Practice,making B.To practice,makingC.Practicing,make D.To practice,make（答案给的B）
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