Fully ____________ looking after three children at home, she no longer has time to enjoy the various activities in the club.
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.
Nowadays, _______ cars are more and more popular.