25. – Tom, it's too late. Our son ________ be back.– Don't be anxious. I dare say he ________ have some extra work to do.
The boy disappeared in the village five years ago and he ever since.
We've had a good start, but next, more work needs ________ to achieve the final success.
——Have you heard about that fire in the market?——Yes, fortunately no one .
They look forward a chance to receive further education.
The discovery of these tombs is ______ for scholars' studying Chinese history.