a lot of foreigners --- familiar with the famous places of interest in chinaa\ am b\ isc\ ared\ be请说明理由好吗?

a lot of foreigners --- familiar with the famous places of interest in china
a\ am
b\ is
c\ are
d\ be
请说明理由好吗?

C,a lot of foreigners是复数名词,谓语同样用复数

are, 主语是复数