The whole morning _____ the windows and the floors tomorrow.
–How much salt did you put in the soup? --I’m sorry to say, _________. I forgot.
Helen ________ her keys in the office so she had to wait until her husband ______ home.
People in Tianjin are proud of ______ they have achieved in the past few years.
Bears often hide themselves in places __________ can’t be found by hunters.
There were dirty marks on her trousers _______ she had wiped her hands.