The chances of discovering life on Neptune are about a million _____.
| A．at one | B．for one | C．to one | D．against one |
Jim’s mother just wants to know that makes him so nervous.
| A．why it does | B．what he does |
| C．how it is | D．what it is |
, we would have caught the first bus.
| A．Had we got up earlier |
| B．If we got up earlier |
| C．Should we get up earlier |
| D．Unless we had got up earlier |
Failure is one thing; it counts to find out your faults lie.
| A．what | B．which | C．where | D．how |
Not until he walked into the classroom that he left his dictionary at home.
| A．did he find | B．had he found |
| C．he had found | D．he found |
it has turned out, there was no need to worry about their safety.
| A．While | B．As if |
| C．Now that | D．As |