He was a bit nervous. He ____ his breath with a soft sound that was almost heard by the audience.
| A．gave out | B．let out | C．picked out | D．blew out |
He found it increasingly difficult to read，________ his eyesight was beginning to fail.
| A．though | B．for | C．but | D．so |
Goals have to be realistic ________ students can reach them and feel a sense of achievement.
| A．so long as | B．so that |
| C．now that | D．even though |
The agent was about to sign his name to the document ________，to our surprise，a stranger broke in to prevent him.
| A．while | B．when |
| C．as | D．until |
Please arrange an interview with the manager tomorrow，or ________ it is convenient to him.
| A．whenever | B．however |
| C．whichever | D．wherever |
—What do you think of it?
—Well，it’s worth doing ________ the result is satisfactory.
| A．the moment | B．as soon as |
| C．once | D．so long as |