【题目】It is no good ______ him to see you off．

【题目】You ____ swim here. It is said that sharks (鲨鱼) have been seen.

【题目】To invent a new kind of electric light, Thomas Edison did lots of ____.

【题目】The sign“______”is often found in a reading room or a library．

【题目】He isn't a teacher，my father isn't a teacher， ______．

【题目】Parents always compare their children ______ others'．

【题目】This book is ______for a sixyearold child to read．

【题目】Scientists sometimes ______ the human brain ______ a computer．

【题目】Daming didn’t take a photo in the museum. I didn’t, _______

【题目】﹣Lucy，when you leave the room, please ____the light. ﹣OK, Mom.