If _____ without following the doctor’s instructions, the medicine may have serious side effects.
| A．taken | B．to be taken | C．taking | D．being taken |
I hope there are enough glasses for each guest to have ______.
| A．it | B．those | C．then | D．one |
-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 |