Between the two rows of trees _____the teaching building.
The annual Christmas party last night was________success. We sang and danced until it came to________end at 12∶30.
I’d like to work with _______ is honest and easy to get on with.
—I can’t thank you enough for the gift you sent me. —__________.
The government has made many laws ______ the people’s interests.
This problem may lead to more serious ones if _____ unsolved.