Helen___her keys in the office,so she had to wait until her husband___home.a.has left,comeb.left,had come c.had left,come d.had left,would come帮帮忙啊~~~解释一下~~~

Helen___her keys in the office so she had to wait until her husband__ home. Helen___her keys in the office,so she had to wait until her husband___home.a.has left,comeb.left,had come c.had left,come d.had left,would come帮帮忙啊~~~解释一下~~~ your keys in the drawer. 这句哪错了 There are some keys in my bag.改同义句- - some keys in the bag! aer the keys in the lost and found keys your in pencil case the are ?连词成句 A set of keys is in it.变为一般疑问句 my keys are in the backpack.一般疑问句 can it be in the classroom____ you left your keys are,some,keys,classroom 7,in,（连词成句） 连词成句.her,in,keys,the,are,schoolbag,(?) your keys in the schoolbag 哪错了 are his keys in the schoolbag作否定回答 Never leave your keys in your car.的汉意 i must have left the keys in the cofe. ;your keys in the drawer'句中错在哪里 these are some keys in classroom e7改为否定句 Are the keys in the drawer?(否定回答)