25. The sooner one _____ to the new working conditions, the better it will be _______ his working efficiency.
My father and his teacher talked for about an hour of things and persons ______ they remembered at the school.
They have to explain ______ us the reason _____ their doing so.
Hand in hand with reading, Dave ____ the habit of making notes.
In the past few years, Chinese scientists ________ great success in the field of space flight.
History is _______ a subject which only lets us know something in history..