Which of the following is true according to the passage？
A. Modern tutors are more patient than those in the past.
B. Students are praised whenever they learn new things.
Courseware quality improves with the help of parents.
D. Tutoring systems can help students build self-esteem.
The U. S. Centers for Disease Control suggested routine HIV tests for
A. emergency-room patients.
B. resident patients.
C. all new patients.
D. suspicious patients.
It can be inferred that by the eleventh century the Byzantine military forces______.
A. had reached their peak and begun to decline
B. had eliminated the Bulgarian army
C. were comparable in size to the army of Rome under Augustus
D. were strong enough to withstand the Abbasid Caliphate's military forces
The two conversations quoted here imply that______.
A. both working class mothers and middle class ones can refuse a request reasonably
B. neither working class mothers nor middle class ones want their children to eat very often the ice cream
C. working class mothers often speak more authoritatively
D. middle class mothers often speak with elaborated code
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