I like getting up very early in summer. The morning air is good _______.
| A．to be breathed | B．being breathed |
| C．breathing | D．to breathe |
—I'm terribly sorry to have put you through so much trouble.
—__________. I know you didn't mean to.
| A．Forget about it |
| B．No trouble |
| C．All right |
| D．You're welcome |
In face of failure, it is important to __________ a good state of mind.
| A．keep up |
| B．keep on |
| C．keep out |
| D．keep off |
How badly reform is needed was __________ recently by the rising youth crime figures.
| A．suspected |
| B．indicated |
| C．influenced |
| D．announced |
__________ gas is needed for the increasing cars to run in the street.
| A．A great many |
| B．A great deal of |
| C．A number of |
| D．Quantities of |
1. He will never __________ though every means __________ tried already.
| A．lose heart; has been |
| B．lose heart; have been |
| C．lose his heart; was |
| D．lose his heart; had |