What's in the tree? 回答选项有两个 A.They' re some bird
What'sinthetree?回答选项有两个A.They'resomebirds.B.It'sabird.哪个正确?（问句是Therebe句型对主语（物）的提问理应用W...
What's in the tree? 回答选项有两个 A.They' re some birds. B.It's a bird.哪个正确? （问句是There be句型对主语（物）的提问理应用What's 而不能用What're .）
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