31. A warm thought suddenly came to me _______ I might use the pocket money to buy some flowers for my mother’s birthday.
______it is to take a rest after a long run!
Mr Black, who is a ______, is in love with Miss Smith, who is a ______.
---The floor is dirty. Can anyone clean it? ---______I do it all the time.
It is said that Mr. White will ________ Mr. Green in this school.
When he went out of his office, he found his car __________.