The professor spoke so fast during the lecture that we couldn’t _____ what he said.
It took a great deal of courage to admit that all their efforts had been ________.
Being honest is usually thought of as a virtue and undoubtedly this is the ________.
The Minister of France stresses that the quality of production,________ the quantity of production, is the key to improving the nation's economy.
Mary was much kinder to Jack than she was to the others,______, of course, made all the others upset.(2011·北京)
The form cannot be signed by anyone ________ yourself.(2011·全国Ⅰ)