_________, so he is afraid of dogs .
| A．Having been bitten twice | B．Bitten twice |
| C．After he has been bitten twice | D．He has been bitten twice |
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 |
Peter, though a green hand, has earned not only the trust of his fellow workers but also ________ of his boss.
| A．one | B．ones |
| C．that | D．those |