[外语] 求几道英语选择题正确答案，谢谢

1The buses here---on  time
A are never  leaving  B never  leave  Cwill never  leave  D  would  never  left
2He  asked  me where I----Mary.
Alast  saw  B  have last seen  Cwould  last see  D  had  last seen
5----a reply  ,he decied  to write  again.
ANot receiving  B  Receiving  not  CNot having   received  Dhaving  not   received  

19Isuppose  Jack---how  to  get  there
Ahas  k now  Bknows  Chas  been  knowing   Dis  knowing
20---theletter  ,Iran  out of  the room to the  post office.
A  After Ihad finished  BAs  soon  as  finished  writing  CNo  sooner Ihad finished
DSince  I finished    inwriting
28There  was  a terrible  noise  ----the  sudden   burst  of  light.
A Followed  B followed  by   C  Being  followed  D  being  followed  这几道吃不准答案，有知道的吗？谢谢.