The Smiths have three daughters, one a baby, and ________ twins of twelve.
| A．another | B．the other |
| C．others | D．the others |
Those were the graduate assistants ______ to do the research work in the lab.
| A．to whom it was their responsibility | B．whose responsibility there was |
| C．whose responsibility was | D．of whom with the responsibility |
It was dark in the cave so she ______ a match.
| A．struck | B．hit | C．fired | D．burned |
. ______ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet.
| A．That amazed | B．It amazed | C．Which amazed | D．What amazed |
It is quite common for a working man to make ______ for his old age by putting aside enough money to live on.
| A．adjustment | B．supply | C．assurance | D．provision |
Classification is a useful ______ to the organization of knowledge in any field.
| A．means | B．approach | C．mode | D．manner |