28c The effect of information technology on education.
29b once or twice
30c Computer software
31a Design materials for the students
32d Students' learning time won't be monitored.
II.33 john suggested that barbara should put better lock on the door
34 despite his both broken legs he managed to get out of the car before it exploded
35 this is the first time I have eaten this kind of fodd
36 plans for an extension to the house have been drawn by the architect
37 You don't have to finish by Saturday.
38 The journalist wanted to know how many survivors there were.
39 the meat was so rotten that it had to be thrown away
40 Professor john lee must be met at the airport
