问题
选择题
| —Who's on _____ duty today? —Li Lei. But he isn't at _____ school today. |
A. the, the B. the, / C. /, the D. /, / |
答案
答案：D
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| —Who's on _____ duty today? —Li Lei. But he isn't at _____ school today. |
A. the, the B. the, / C. /, the D. /, / |
答案：D