---______ the farmers discovered the entrance to the secret cave in the valley?
--- Totally by chance.
| A．When was it that | B．How was it that | C．How it was that | D．When it was that |
You are old enough to _____ your own living. (2011 .辽宁)
| A．win |
| B．gain |
| C．take |
| D．earn |
Your _____ as a student will be excellent if you develop a habit of reflecting on how you learn. (2012-浙江)
| A．operation |
| B．growth |
| C．performance |
| D．character |
-How would you like to be paid, ____ cash or ____ check?
-Neither. I want to invest the money in your business.
| A．in; in |
| B．by; by |
| C．with; with |
| D．in; by |
During the busiest season like National Day and the Spring Festival, the traffic company provides ____ buses for the travelers.
| A．extra |
| B．same |
| C．different |
| D．unusual |
-How about your journey to Mount Emei?
-Everything was wonderful except that our car ____ twice on the way.
| A．slowed down |
| B．broke down |
| C．got down |
| D．put down |