Practice choosing between Simple Past and Past Perfect

By the time we --had arrivedarrived , the movie --had startedstarted .

When I --had gonewent to the store, I --forgothad forgotten my wallet.

They --had lostlost the match because they --hadn't practiceddidn't practice well.

I --readhad read that book before she --had mentionedmentioned it.

By the time we --finishedhad finished dinner, the show --beganhad begun .

He had already done his homework before he --had gonewent out to play.

She --hadn't recognizeddidn't recognize him because he --had changedchanged so much.

When we --arrivedhad arrived at the station, the train --lefthad left .

By the time the teacher --camehad come , the students --had completedcompleted the test.