问题
选择题
| We rushed to the football court, only to see a sign _____ into the ground reading PERIODIC MAINTENANCE(定期维修). |
A. knocked B. knocking C. to be knocked D. being knocked |
答案
答案：A
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| We rushed to the football court, only to see a sign _____ into the ground reading PERIODIC MAINTENANCE(定期维修). |
A. knocked B. knocking C. to be knocked D. being knocked |
答案：A