試題選項拼字練習 (99年指考第7題)
99年指考第7題
請按滑鼠或字鍵選出正確或最適當的答案:
The water company inspects the pipelines and _____ the water supply regularly to ensure the safety of our drinking water.
參考詞彙 附 錄第一級第二級第三級第四級第五級第六級