__ _in a heavy traffic jam in a taxi while you are hurrying to the airport is quite a unpleasant experience．
| A．Having caught | B．Being caught |
| C．Caught | D．Having being caugh |
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 |
Life is like riding a bicycle. _____ your balance, you must keep moving.
| A．To keep | B．Keeping |
| C．Being kept | D．Having kept |