题文
As soon as he got to the office, he ___ the students’ papers.
| A．got down to correct |
| B．got down to correcting |
| C．set down to correcting |
| D．sit down to correcting |
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As soon as he got to the office, he ___ the students’ papers.
| A．got down to correct |
| B．got down to correcting |
| C．set down to correcting |
| D．sit down to correcting |
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