This is an illness that can result in total blindness ________ left untreated.
| A．after | B．if |
| C．since | D．unless |
30．一Cydia，what did you hear our teacher said just now?
一Every boy and every girl as well as the teacher who___to lead the group____asked to be at the school gate before 6：30 in the morning
| A．is；is | B．are；ate | C．are；is | D．is；are |
29．Internet，as well as newspapers and magazines，____an inportant part in our daily life．
| A．have played | B．are playing |
| C．is playing | D．has been played |
28． What you said____quite to the point but what we need____experienced technical workers．
| A．is；ale | B．is；is | C．are；are | D．are；is |
27．Today Chinese____by more and more people around the world
| A．was spoken | B．speak | C．spoke | D．is spoken |
26．The famous writer as well as his wife and daughter_____said to______our party，but so far they_____．
| A．are；have attended；don’t turn up | B．is；have attended；haven’t turned |
| C．is；attend；haven’t turned up | D．are；attend；don’t turn up |