Put the verbs in brackets:

Linda ___ (try) to find a present for her mum for over an hour before she ___ (finally/see) soething nice to buy her.
William ___ (already/hear) the news when I ___ (call) to tell him.
While Emma ___ (do) her homework, her brother ___ (play) music loudly, and she couldn't concentrate.
Nathan ___ (come) across a photo of his great-grandfather as he ___ (look) through some old things.
Helen ___ (be) exhausted because she ___ (jog) for two hours.