---Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A. there remains; answered　　　　　　　 　　 B. it remains; to be answered

C. there remains; to be answered　　　　　 　 D. it remains; answered

---Have all the mysteries been cleared up?
--- Almost. But ______ only one question ______

1. A.
   there remains; answered
2. B.
   it remains; to be answered
3. C.
   there remains; to be answered
4. D.
   it remains; answered

--Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A. there remains; answered                B. it remains; to be answered

C. there remains; to be answered        D. it remains; answered

 ---Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A. there remains; answered                            B. it remains; to be answered

C. there remains; to be answered                D. it remains; answered

（2011·黑龙江哈三中10月考）---Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A. there remains; answered　　　　　　　 　　　　　 B. it remains; to be answered

C. there remains; to be answered　　　　　 　 D. it remains; answered