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
_____ for a long time, but he tried his best to make up for what he missed．
A．Being ill staying in hospital B．Having been ill staying in hospital
C．He was ill staying in hospital D．To be ill staying in hospital
--- Put these glasses away before they __________．
--- OK．I will put them in the cupboard．
A．have broken B．are breaking C．get broken D．will be broken
