I travel to the Binhai New Area by light railway every day，________ do many businessmen who live in downtown Tianjin.
A．as B．which C．when D．though
A person ________ email account is full won't be able to send or receive any emails.
A．who B．whom C．whose D．whoever
She'll never forget her stay there ________ she found her son who had gone missing two years before.
A．that B．which C．where D．when
Gun control is a subject ________ Americans have argued for a long time.
A．of which B．with which
C．about which D．into which
Whenever I met her，________ was fairly often，she greeted me with a sweet smile.
A．who B．which C．when D．that
She brought with her three friends，none of ________ I had ever met before.
A．them B．who C．whom D．these
