作业帮求详细解答：用括号内所给单词的适
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求详细解答：用括号内所给单词的适
| 用括号内所给单词的适当形式填空. |
| 1. It usually takes me half an hour _________ (walk) to school. 2. The government should pay much attention to the _________ (increase) population. 3. The grand piano takes up too much _________ (room). 4. I think Beijing is one of the __________ (beautiful) places in the world. 5. No one _________ (know) when he will be back. |
1.to walk 2.increasing 3.room 4.most beautiful 5.knows