Some scientists believe that it won’t be long _______ robots are widely used in all walks of life．
| A．since | B．after | C．before | D．until |
The whole family still live in the house, most of _____ windows face south.
| A．the | B．whose | C．its | D．which |
Henry, take this seat, ________ you’ll have to stand watching the game.
| A．or | B．so | C．and | D．then |
_____ mobile phone is very convenient, school children are not allowed to own one.
| A．If | B．While | C．Because | D．When |
Lucy didn’t do well in this exam, ______ made her mother quite unhappy.
| A．that | B．it | C．which | D．this |
-- What do you think of __________ school sports meeting ?
-- _______ great success.
| A．不填, A | B． the, A | C． the, The | D． the,不填 |