--- 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

 _____ 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

 It is ______ the old clock that the old man spent the whole afternoon with me yesterday afternoon．

      A．to repair           B．repairing           C．repair             D．repaired

 The food, ____________good, was soon sold out when it was taken to the market．

      A．tasted             B．being tasted       C．tasting            D．having tasted

 ---- How long _____ you ______ in the country with your uncle, Henry?

  ---- About two weeks．I’ll return as soon as school starts．

      A．had; stayed        B．are; staying        C．did; stay           D．do; stay