题目内容
【题目】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
【答案】B
【解析】get down to意思是“着手某事”,其中to是介词,后跟名词或动名词。
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