1. [单选题]_________is a great pity that there are some disagreements in the school board meeting.
A. That
B. This
C. It
D. There
2. [单选题]This passage is mainly about______.
A. how Louis Pasteur's friend died
B. Louis Pasteur's experience and achievement in curing rabies
C. how Louis Pasteur's arm and leg were disabled
D. Louis Pasteur cured a boy who had been badly bitten by a mad dog
3. [单选题]I bought a new house last year, but I_________ my old house yet, so at the moment I have two houses.
A. didn't sell
B. have not sold
C. had not sold
D. don't sell
