Question

Our problem ________ who could go there to help the teacher.

1. A.
   consists of
2. B.
   consist of
3. C.
   consisted in
4. D.
   consisted of

Answer 1

C
解本题的关键是时态问题，根据主从句时态一致性原则，此处主句应用过去时态，且表示“主要在于”的含义。