---Is there any to the time about how long I can stay here?---Yes you must leave here be

问题补充：

---Is there any to the time about how long I can stay here?

---Yes, you must leave here before he comes back.

A. number

B. length

C. limit

D. matter

答案：

A. number

B. length

(答案→)C. limit

D. matter

解析：句意：--我能呆在这里多长时间有时间限制吗?—是的，你必须在他回来之前离开这里。number编号； length长度； limit限制； matter事件。根据句意故选C。