Some researchers believe that there is no doubt _______ a cure for AIDS will be found.
Don't handle the vase as if it ________made of steel.
— Is Paul playing both soccer and tennis for the school? — He ______. But now he has given up playing tennis.
We like Jack because he is a man ______everybody thinks is pleasant to _____.
Mr. Xue enjoyed ________ by working in Yangzhou-Taizhou Airport because he always hates ________ while staying alone at home all day long.
—Who do you think will get the first prize? —Mary, of course. She ________ for the competition for months.