But if a treatment ________ delayed the disease by seven years were to be available, the number of sufferers would drop by 40% by the middle of the century.
Who is the man ___ shook hands with you a moment age?
This is the reason ___ I agree to it.
The reason for his absence from school was ____ he fell ill.
The problem lies ___ she knows little English.
.She said ___ she ate little and ___ she was not hungry.