請(qǐng)看圖將下列句子補(bǔ)充完整，注意冠詞的使用。
1. What's this?  It's ________________. 
2. What's this?  It's ________________. 
3. What's that?  It's ________________. 
4. What's that?  It's ________________. 
5. What's that?  It's ________________. 
1. a watermelon / melon  2. an apple  3. an orange  4. a strawberry  5. a peach
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