Past simple vs past perfect simple 4 - tutto inglese - Imparare l'inglese gratis on line

They (trim) the hedges before the landscapers (arrive).
I (return) all the calls before I (leave) the office.
He (update) the software before the new regulations (come) into effect.
She (cancel) her subscription before the next billing cycle (start).
We (lock) up the shop before we all (go) home.
He (plant) the garden before the first frost (come).
She (answer) all the emails before she (turn) off her computer.
They (research) the topic before they (write) the paper.
I (jog) five miles before I (eat) breakfast.
He (organize) the files before the audit (begin).