单选题 The president, with his wife and daughter, (are) returning (from) a brief vacation at Sun Valley in order (to attend) a press conference (this afternoon).

A、 are
B、 from
C、 to attend
D、 this afternoon

【正确答案】 A

【答案解析】将A选项are改为is。在该句中，the president是真正的主语，而with his wife and daughter是一介词短语做插入语，所以谓语要用单数形式。