---Tom hurt his left leg in the game this morning.---Really? It would take at least two weeks ______ he could recover and return to school.
To the great ______ of the young writer, his first book sells well after it was published in May.
The time she has devoted in the past decade ______ the disabled is now considered to be very valuable.
—Do you still remember the days ______ we spent in the countryside ten years ago? —Yes,I'll never forget the experience.
All the universities have duty to ______ their students ______ of the quick development of the scientific world.
I don’t think the experiment is ______ failure. At least we have gained _______ experience.