Directions: Supply the correct form of the verb given in bracket.

As Suresh (run) to catch the bus yesterday, he fell down and broke his arm.

The word "yesterday" indicates past time, and since Suresh was in the middle of running when he fell, the past continuous tense "was running" is correct. "Is running" is present tense, "has been running" connects past to present, and "has run" is present perfect - none of which fit the past context with an interrupted action.