_________, the car could not be started.
| A．Having lost the key | B．He lost the key | C．The key was missed | D．The key lost |
He began to take political science only when he left school .
| A．strictly | B．truly | C．carefully | D．seriously |
If we can our present difficulties , then everything should be all right .
| A．come across | B．get over | C．come over | D．get off |
People try to avoid public transportation delays by using their own cars , and this
creates further problems .
| A．in short | B．in case | C．in doubt | D．in turn |
She devoted herselfto her research and it earned her a good reputation in her field .
| A． | strongly | B． | extremely | C． | entirely | D． | freely |
If the firms failed to make enough money , they would.
| A． | close down | B． | call off | C． | turn down | D． | set off |