A．To review material covered in an earlier lecture．
B．To change students ’approach to writing．
C．To point out an example of good writing．
D．To give an assignment for the next class．

A．To correct mistakes in spelling and grammar．
B．To make smooth transitions between ideas．
C．To add more specific details and examples．
D．To improve overall effectiveness．

A．Within the first week of class．
B．Two weeks before the final due date．
C．By the end of the term．
D．A week after the last class．