When she woke up, she realized that the things she had dreamt about could not ____ have happened.
| A．possibly | B．likely | C．certainly | D．usually |
-Do you think we can get there on time? -Yes，_______ the truck doesn’t break down.
| A．even if | B．unless | C．until | D．so long as |
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
| A．that | B．as | C．so that | D．which |
Some international organizations _____ the fact that developing and developed countries were in different stages of development and should shoulder different responsibilities .
| A．refused | B．denied | C．missed | D．rejected |
________ Yao Ming has retired from the NBA，the pleasure we have got by watching him play basketball at home and abroad will last long.
| A．Although | B．If | C．Since | D．Once |
The moment ____ soon, he thought to himself, waiting nervously.
| A．came | B．has come | C．was coming | D．is coming |