_________ is known to all，good friends _________ happiness and value to life.
| A．It； add | B．As； add |
| C．It； add up | D．As； add to |
_________ in the adult ceremony, the senior students feel they are shouldering heavier responsibilities now.
| A．Swear | B．Sworn |
| C．Having sworn | D．To have sworn |
In spite of his ________ to be a scholar in that field, he is not well equipped with that talent.
| A．potential | B．competence |
| C．ambition | D．character |
One reason ______ Billy Crystal is popular with all age groups is _______ he is quick thinking and has the ability to amuse the audience.
| A．that, that | B．why, because |
| C．why, why | D．why, that |
The audience _______ as they waited for the comedian to come on the stage.
| A．fell silence | B．fell silent |
| C．fall silently | D．feel silent |
We wanted to purchase the house, but couldn’t ________ the money.
| A．come down with | B．come up with |
| C．bring out | D．bring in |