—under the desk? －No they aren’t.A. Where areB. What’sC. Are those rulersD. Is that ruler

问题补充：

—under the desk? －No, they aren’t.

A. Where are

B. What’s

C. Are those rulers

D. Is that ruler

答案：

A. Where are

B. What’s

(答案→)C. Are those rulers

D. Is that ruler

解析：句意：——这些尺子在桌子底下吗？——不，它们不在。根据答语No, they aren’t可知，问句是一个一般疑问句，并且使用复数。