. Two hundred dollars ________ a small price to pay for the secondhand refrigerator.
She ______ 21 in June.
The student must be working very hard, ________?
I can’t have him _______ fun of others.
At long last the child was found on top of ______ we call the museum of science and technology.
Personally, the job as a teacher _____ be challenging, for I sometimes _____ deal with some smarter but less diligent students.