【题目】写出下列单词的ing形式
1. catch_________ 2. play_________ 3. run_________ 4. swim_________
【答案】catchingplayingrunningswimming
【解析】
略
【题目】写出下列单词的ing形式
1. catch_________ 2. play_________ 3. run_________ 4. swim_________
【答案】catchingplayingrunningswimming
【解析】
略