问题
选择题
I usually _____ the reading after I do my homework. Now I _____ the reading. [ ]
A. do; doing
B. am doing; do
C. do; am doing
D. am doing; am doing
答案
答案：C
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I usually _____ the reading after I do my homework. Now I _____ the reading. [ ]
A. do; doing
B. am doing; do
C. do; am doing
D. am doing; am doing
答案：C