-- his keys?They’re in the drawerA. Where areB. WhereC. Where isD. What’s

-- his keys? --They’re in the drawer．
A. Where are
B. Where
C. Where is
D. What’s

(答案→)A. Where areB. WhereC. Where isD. What’s解析：根据答语内容They’re in the drawer．，可知问句为文地点的，而his keys 表示钥匙，为复数形式，故选A，用be动词are。

谢谢解答