问题
选择题
Mary is the only one of the girls who _____ often late for school.
A．is
B．are
C．comes
D．get
答案
A
Who作定语从句的主语时，其谓语取决于先行词。但要注意：....one of the ...复数名词 + who / that / which + 复数谓动；....the only one of the .... 复数名词 + who / that / which + 单数谓动。