Question

Откройте скобки: When I (come) home yesterday, I (see) that my litlle brother (to break) my pen and (to play) with its pieces.

Answer 1

1) came

2) saw

3) was breaking

4) was playing 

Answer 2

When I came home yesterday, I saw that my little brother had broken my pen and was playing with its pieces.

Explanation:

The sentence describes an action that happened in the past. The verb tense used is the past simple tense for the first part of the sentence ("When I came home yesterday, I saw...") and the past perfect tense for the second part ("...that my little brother had broken my pen and was playing with its pieces"). The past perfect tense is used to indicate that the action of breaking the pen occurred before the action of seeing it.

Example:

"When I came home yesterday, I saw that my little brother had broken my pen and was playing with its pieces."