This is the best way ______ I have thought of ______ the problem.
He is no longer in good condition, and his ability to work is limited. I _______ him to give up the job but failed.
---Shall I keep an eye on your house when you are on holiday? ---________.
The new road is __________ of the old one.
Electronic devices such as iPods and headphones can do great harm to our hearing if _______ improperly.
A new __________to teaching English, is being used here, and it has proven to be very helpful to the students.