By the time he was twelve, Edison _______ to make a living by himself.

  A. has begun  B. began        C. had begun        D. had been beginning

In China, the education is divided into three _______: basic education, higher education and adult education.

  A. scores     B. categories       C. degrees      D. trends

The children ran away from the orchard(果园)________ they saw the guard.

  A. for the moment B. by the moment    C. the moment       D. at the moment

If I take this medicine twice a day, it should _______ my cold.

  A. heat       B. cure     C. treat        D. help

I remembered my grandma _________ me stories when I was a little child.

  A. used to tell    B. used to telling   C. was used to tell   D. is used to telling

The forest guards often find campfires that have not been _______ completely.

  A. turned down        B. put out          C. put away     D. turned over

The merchant made me promise not to ______ where the goods were hidden.

  A. give up        B. give away        C. get across       D. get out

Jumping out of _______ airplane at ten thousand feet is quite _______ exciting experience.

  A. /; /       B. /; an        C. an; an       D. the; the

_____ was most important to her was her family.

A. It      B. This     C. What      D. As

A group of firefighters were called in to rescue the woman ______ in a dry well.

  A. who trapped        B. trapping     C. trapped      D. to be trapped