He did not regret saying what he did but felt that he it differently.

对句中加点字解释有误的一项是（ ）

The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week

are unable to attend the interview, for _____reason, you should inform us immediately.

_____ the population of the U.S.A. in 2005—It _____ about 296 million.