主谓一致
　　41、His family music lovers.
　　A.all are B.are all C.is D.are being
　　42、A professor and a writer present at the meeting.
　　A.was B.is C.were D.had been
　　43、The pair of shoes worn out.
　　A.was B.were C.have been D.had been
　　44、The students in our school each an English dictionary.
　　A.have B.has C.had D.are having
　　45、More than one answer to the question.
　　A.have been given B.has been given C.were given D.had given

　　参考答案：
　　41、B
　　42、C
　　43、A 因此句主语是pair，所以用单数。
　　44、A 因此句主语是the students，所以用复数。如果each作主语，谓语动词则用 第三人称单数形式。如：Each of the students / Each student has an English dictionary.
　　45、B 此句中的主语是one answer，所以谓语动词应与它保持一致。