31、His family   music lovers.

A．all are            B．are all            C．is                   D．are being

32、A professor and a writer  present at the meeting.

A．was         B．is      C．were        D．had been

33、The pair of shoes  worn out.

A．was                B．were        C．have been      D．had been

34、The students in our school each  an English dictionary.

A．have        B．has                 C．had                D．are having

35、More than one answer  to the question.

A．have been given    B．has been given      C．were given     D．had given

31、B

32、C

33、A  因此句主语是pair，所以用单数。

34、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.

35、B  此句中的主语是one answer，所以谓语动词应与它保持一致。