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参考答案 1-5、ABABA;6-10、CAACA;11-15、ACCCB;16-20、ACBBC;21-25、BCBBB;26-30、AABCA;31-35、CBDCA;36-40、CBEGF;41-45、ABCDA;46-50、BCDAB;51-55、CDBAC;56-60、DCBAD;[来源:学*科*网Z*X*X*K][来源:学科网ZXXK] 61-70、[来源:学*科*网Z*X*X*K] 71、 Last year, our school offered optional courses for the students in Senior 2. At the beginning of (1)a term, our teacher introduced several courses to us, (2)included Music Appreciation, Advanced Math, Western Art, and etc. We selected the courses we (3)were liked, filled in the forms, and (4)handing them in. Several days (5)late, the optional courses started. We went into different (6)classroom to begin our study (7)delightful. During the lessons, some of (8)them enjoyed beautiful music, while others learned amazing knowledge in math. Everyone gained (9)which they couldn't get in the regular lessons. Thanks to the optional courses, we had the opportunities to learn what we were really (10)interested. (1)将a改为the; (2)将included改为including; (3)将were去掉; (4)将handing改为handed; (5)将late改成later;