| 用所给单词的适当形式填空。 | |
2. There are some trees behind the _____. 3. How many people are there in your _____ ? 4. —Where's Liu Ming? —I think he is at _____. |
| 用所给单词的适当形式填空。 | |
2. There are _____ balls under the bed. 3. What about _____ bananas? 4. I can't see _____ birds in the tree. |