Put the verbs in brackets into the past simple or past continuous. 6 While Kate (drink) some milk, she (drop) the glass.

While Kate **was drinking** some milk, she **dropped** the glass.
Explanation: The action of drinking milk was in progress when she dropped the glass, so we use the past continuous for drinking milk ('was drinking'). The dropping of the glass is a completed action, so it is in the past simple ('dropped').