The factory produced many famous cars, none of ______ shipped to foreign countries．
A．them B．which C．it D．what
--- It’s a long time __________ I saw you last．
--- Yes, and what a pity it is now that it will be a long time _______ we see each other again．
A．before;since B．since; when C．since;before D．when;before
So quickly are science and technology advancing_________ is a possibility today may be a reality tomorrow．
A．which B．what C．that which D．that what
In the past few years, “My Heart Will Go On” was a popular song among young people, __________ were often heard singing it at parties．
A．who B．which C．they D．that
The boy dived into the water and after __________ seemed to be a long time,he came up again．
A．what B．that C．it D．which
---- Several department stores, including the one we usually go to, _____ sidewalk sales this week．
---- Let’s go and have a look．
A．is having B．are having C．has D．have had
