A．The man didn't study hard enough.
B．The man didn't attend enough classes.
C．There are some problems with the experiment.
D．The full mark isn't 100 points.
A．Because her grandfather is ill.
B．Because her uncle will visit her.
C．Because she has too much pressure at work.
D．Because the auditors found some of her mistakes.
A．She must wait till the auditors leave.
B．She must choose a new director.
C．She must keep in touch with her colleagues.
D．She must report her whereabouts from time to time.