He once observed that “All happy families ________ one another, but each unhappy family is unhappy in its own way”.(2012·桂林十八校联考)
.The question he asked is hard ____ .
.By the end of last year, another new gymnasium ____ in Beijing.
.More than a dozen students in that school ___ abroad to study medicine last year.
.--Why did you leave that position? -- I __a better position at IBM.
.I feel it is your husband who ___ for the spoiled child.