At the age of 29, Dave was a worker, ______ in a small apartment near Boston and ______ what to do about his future.
It was not until the teacher had explained it three times _______ how to work out the problem.
Only after my friend came ____.
Dickson left his father’s firm and ____business on his own.
There is no doubt _______international cooperation is the key to dealing with cyber crime.
Considering your salary, you should ________ at least 100 dollars a week.