语法总结
Is it ... or ...? 选择疑问句
用 Is it A or B? 在两个选项中进行猜测，回答可用 It's A。
例：Is it grape juice or cherry juice? It's grape juice.
感官动词后接形容词
smell、taste 后可接形容词，描述闻起来或尝起来的感觉。
例：They smell nice. It's sweet.
What's this? / What do you have?
What's this? 询问这是什么；What do you have? 询问你有什么。
例：What's this? It's an apple. I have an apple.