问题
选择题
The students _ their homework every day. Now they _ their homework. [ ]
A. do; do
B. does; doing
C. doing; are doing
D. do; are doing
答案
答案：D
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The students _ their homework every day. Now they _ their homework. [ ]
A. do; do
B. does; doing
C. doing; are doing
D. do; are doing
答案：D