— What a shame ! It turned out to be a failure.— We missed a process,_______ we could not succeed in the experiment.
The discovery of these tombs is _______ for scholars’ studying the history of the Tang Dynasty.
Life ____ be much happier if we ____ only be born at the age of 80 and gradually approach 18.
After floods had destroyed crops and houses, the farmers in the village were _____ food and shelter.
Never lose _____ heart. There is always a chance of _____ weak defeating _____ strong.
Everyone can borrow from this public library only two books _____ and they must be returned within a month.