问题
选择题
| —Mr Gao went to Shanghai for the air exhibition last week. —Is that _______ he had two days off? |
A. what B. when C. why D. where |
答案
答案：C
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| —Mr Gao went to Shanghai for the air exhibition last week. —Is that _______ he had two days off? |
A. what B. when C. why D. where |
答案：C