Bob had left his keys in the office,so he had to wait until

Bob had left his keys in the office,so he had to wait until Helen ( ) her keys in the office so she had to wait until he Mr Black ___(leave) his keys in the office,so he had to wait Helen had left her keys in the office so she had to wait unt Helen___her keys in the office,so she had to wait until her Helen _____ her keys in the office so she had to wait until Mrs Smith____her keys in the office.so she had to wait until Helen___her keys in the office so she had to wait until her His father left his keys in the house,so he had to climb in Helen had lost her keys in the office so she had to wait unt 英语15.Helen _______ her keys in the office so she had to wait 16.Mrs Smith----- her keys in the office so she had to wait