51~55번

51. How did it happen?

  ⓐ How did it (t        ) (       )?

  ⓑ How did it (c        ) (       )?

  ⓒ How did it (c        ) (       ) (       )?

52. I said good-bye to them.

  ⓐ I (t       ) (        ) of them.

  ⓑ I (b       ) (        ) to them.

  ⓒ I (t       ) my (        ) (       ) them. 

53. Regardless of the weather, the meeting will be held.

  ⓐ (R       ) or (         ), the meeting will be held.

  ⓑ In (f       )or (f        ) weather, the meeting will be held.

  ⓒ In (        ) weather(s), the meeting will be held.

54. No man is so old but he may learn.

  ⓐ No man is so old (       ) he may (        ) learn.

  ⓑ (        ) old a man may, he may learn.

  ⓒ Regardless (        ) (        ), a man may learn.

55. Keep your promise by all means.

  ⓐ Keep your promise at (       ) (r        )

  ⓑ Keep your promise at (       ) (c        )

  ⓒ Keep your promise at all (       ).