He keeps in the safe $3 million _____ of diamonds.
The number of people who ___ in position of professional skills and knowledge ___ shrinking.
The experiment shows that proper amounts of exercise, if ___ regularly, can improve our health.
It sounds like something is wrong with the car’s engine. ___ we’d better take it to the garage immediately.
Jane won’t join us for dinner tonight and ___.
When deeply absorbed in work, ___he often was, he would forget all about eating or sleeping.