题目内容
| 写出下列动词的第三人称单数形式和现在分词。 | ||
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| 1. watches, watching 2. writes, writing 3. does, doing 4. arrives, arriving 5. has, having |
6. talks, talking 7. cleans, cleaning 8. buys, buying 9. swims,. swimming 10. begins, beginning |
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