题目内容：
I remember being a student teacher in1974, sitting for two weeks in the back of my cooperating teacher′s classroomwatching her teach carefully before I had my chance to try. Her lessons flowed 16from beginning to end, leading me to believe that teaching would be easy. Iremember how 17 I was the first time I stood in front of25 ninth-graders and attempted to teach them Spanish.My lesson wasn′t awful, but it was far fromgraceful and 18. Teaching is a highly complex 19 and only the teacher who is veryskilled can make it appear so simple.
How do effective teachers 20 the skillsthat make their lessons appear easy and appropriate for all students in theclass? 21 , a lot can be learnedfrom attending university classes, 22 conferences and workshops, readingprofessional literature,23 experienced teachers, discussing 24 and ideas with others and, ofcourse, reflecting 25 one′s own teaching. However, some of the most importantlessons that teachers learn do not come from these standard 26 --they come fromthe students themselves.
Most students are probably not aware of theimportant role they 27 in the training of teachers. However, to the wiseteacher, the classroom is a 28 in which various approaches and strategies are29 and refined and in which students communicate, in clear as well as subtleways, whether a lesson was a success, a failure, or 30 in between.
第21题选
A.Frankly
B.Personally
C.Previously
D.Obviously
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