1. Do you know who the computer was i _____ by?
2. The seat belt on a plane are a _____.
3. It was a big m _____ to leave my umbrella at home.
4. A c _____ is a hundred years.
5. Boys, stop t _____ stones to the poor dog.

1. Do you know who the computer was i_______ by? 　　
2. The seat belt on a plane is a_______. 　　
3. It was a big m_______ to leave my umbrella at home. 　　
4. A c______ is a hundred years. 　　
5. Boys, stop t             stones to the poor dog.

A. got…left
B. arrived at…forgot
C. got to…had forgotten
D. arrived…had left