---Will you help me with this mathematical problem? .
---Sure. Let me see.
| A．It’s your turn | B．Go on | C．I’m stuck | D．See what I mean? |
——Did you know any French before you arrived in Washington?
——Never ____ it, actually.
| A．had I learned | B．have I learned |
| C．I have learned | D．I had learned |
Never before ___________in greater need of technical experts than it is today.
| A．has Shenyang been | B．Shenyang has been |
| C．was Shenyang | D．Shenyang was |
Only when _______ possible to settle the problem.
| A．does the editor come will it be | B．the editor comes will it be |
| C．has the editor come it will be | D．the editor comes it will be |
I’m afraid we can’t have coffee; there’s _____ left.
| A．nothing | B．none | C．no one | D．no any |
Mr Ascot, headmaster of the school, refused to accept ______of the three suggestions made by the Students’ Union.
| A．either | B．neither | C．any | D．none |