A.There aren't enough cabinets.
B.There is too much noise.
C.Office supplies are taking us space.
D.Some teachers don't have desks.


A.chat with Jack socially.
B.get help in the course.
C.hand in their assignments.
D.practice giving interviews.
A.They'd have to get permission.
B.Jack wouldn't like it.
C.She thinks it might work.
D.The other assistants should be consulted.
A.A more economical diesel fuel.
B.Characteristics of a new type of fuel.
C.Where is a new energy source located?
D.How to develop alternative energy sources.