She was wandering what to do __ a policeman came and asked if he could help.
| A．while | B．as | C．after | D．when |
In some countries, _____ is called “equality” doesn’t really mean equal rights for all people.
| A．which | B．what | C．that | D．one |
The mere fact _____ most people believe nuclear war would be madness doesn’t mean that it will not occur.
| A．what | B．which | C．that | D．why |
I don’t doubt _____ he is a brilliant scientist, but can he teach?
| A．whether | B．if | C．that | D．what |
Criticism and self-criticism is necessary _____ it helps us to correct our mistakes.
| A．by that | B．at that | C．on that | D．in that |
_____ or not we had a baby, we couldn’t survive only on my salary.
| A．As | B．Even | C．However | D．Whether |