Helen ( ) her keys in the office so she had to wait until her husban ( ) home.A.has left,comes B.left; had come C.had left; came D.had left; would come答案是选C把,为什么

请帮我做几道英语选择题.分别说明下 是什么时态1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husba 1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husband ( ) home.A.has left,come B.left,had come C.had left,came D.had 请帮我做几道英语选择题,并简单分析下.1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husband ( ) home. I h_____a setof keys.Her e_____is in her pencil case 填空 英语15.Helen _______ her keys in the office so she had to wait until her husband ________ home.15.Helen _______ her keys in the office so she had to wait until her husband ________ home.a.has left;comes b.left;had come c.had left;came d.had left;wo I give her the car keys and she helps me to bed Her new book if i were helen tells us her own stories and her difficult life.中文意思是什么 Helen _______ her keys in the office so she had to wait until her husband ________ home.a.has left;comes b.left;had come c.had left;came d.had left;would come要有解析, Helen _____ her keys in the office so she had to wait until her husband _____ home.A.had left; comes B.left; had come C.had left; came D.had left; would come Helen ( ) her keys in the office so she had to wait until her husban ( ) home.A.has left,comes B.left; had come C.had left; came D.had left; would come答案是选C把,为什么 Helen had lost her keys in the office so she had to wait until her husband —— home.A.came B.would come为什么选A不选B? Helen ,name ,her ,first ,is Tell Helen,if she is at home,I will come to see her.改写句子 Helen isn't a true friend of mine ,I feel truly sorry for her. 句式转换 同义词Those dictionaries are Helen‘s Are those her keys?Tese are my dictionaries Are those her erasers Is that Eric's schoolbag?Are these your rulers?改为同义词Those dictionaries areHelen‘s Are those her keys？These are my d Helen studies English well .I often learm ( ) A.from her B.from she C.with her D.with she Linda forgot (bring)her keys this afternoon I lost a s_______of keys.