1) Put the verbs in brackets into the past perfect or the past perfect continuous. 1 We (wait) for the train for three hours when it arrived.
2 Kim (never/try) Mexican food before.
3 Frank (look) for his keys for hours before he found them under the table.
4 Sue (already/read) that book before Jessica gave her it as a present.
5 I (work) in that company for five years when I got a promotion.
6 She (already/book) the tickets for the concert when I called her.
