Is Rick there? No,he____for Beijing three days ago. A.left B.leaves C.has left D.leaving

is rick there?no ,he _ for beijing three days agoa leftb leavesc leavingd has left我只知道c是进行时不行其余的请解释一下 Is Rick there? No,he____for Beijing three days ago. A.left B.leaves C.has left D.leaving 综合填空,首字母已给出.Rick is a tall boy with biond hair.He is sixteen years old.He has a big family.He has two brothers and two sisters.But there is only one shower in their home.Do you think it is difficult?No!Let me tell you （w ）.The There is no one but he There is no doubt that he will come. I can't find tom ,where is he?.he in the library?no,he's.there. there is no doubt that引导的是什么从句?如there is no doubt that he will come. there is no point No longer is there There is no way. there is no way there is no There Is No There is no there is no silver there is no wait there is no evidence If there is no