—Are you going to help him?
—Why ___ I help him? He' s never done anything for me．
| A．would | B．could | C．might | D．should |
English is a language shared by several diverse cultures, each of _____ uses it somewhat differently.
| A．which |
| B．what |
| C．them |
| D．those |
Whatever is left over may be put into the refrigerator, ______ it will keep for two or three weeks.
| A．when |
| B．which |
| C．where |
| D．while |
Care of the soul is a gradual process ______ even the small details of life should be considered.
| A．what |
| B．in what |
| C．which |
| D．in which |
Maria has written two novels, both of ______ have been made into television series.
| A．them |
| B．that |
| C．which |
| D．what |
It is the third time that she has won the race, _______ has surprised us all.
| A．that |
| B．where |
| C．which |
| D．what |