The professor spoke very clearly to make his speech ___.
| A．understood |
| B．understand |
| C．understanding |
| D．to understand |
If you find yourself ______ no one will help you, please call me.
| A．which | B．when |
| C．where | D．what |
A big earthquake hit Ludian in Yunnan, ________ many deaths and injuries and a big loss of property.
| A．to cause | B．caused |
| C．causing | D．having caused |
In my opinion, ________ matters is whether we can win together as a team instead of individuals.
| A．how | B．it | C．that | D．what |
No student ________ go out of the school campus after 10：00 at night without permission according to the school regulations.
| A．shall | B．must |
| C．should | D．would |
Only after one loses something ________ how precious it is.
| A．he will realize | B．will he realize |
| C．he has realized | D．has he realized |