At the meeting they discussed three different ________o the study of mathematics．
| A．approaches | B．means | C．methods | D．ways |
All the people in the nation can remember exactly how many years ago _______ the civil war broke out. 
| A．was it that | B．it was when | C．it was that | D．was it when |
_______ restoration of ancient architecture, the Chinese government has invested a large sum of money on it.
| A．In case of | B．In favor of | C．In terms of | D．In honor of |
I think this is the very work that we must finish ____ her.
| A．to help | B．help |
| C．helping | D．helped |
The work he devoted his time to _____ worth praising.
| A．was | B．be |
| C．being | D．been |
The little girl who got lost decided to remain _________she was and wait tor her mother.
| A．where | B．what | C．how | D．who |