Open up the brackets using the correct tense:

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Dear Bert,
I 1) (write) to tell you what a great time we 2) (have) at the Sour Grapes concert last weekend. It's a pity you 3) (not/come). The concert 4) (take) place in the football stadium near the university. There 5) (be) about 80,000 people there. While we 6) (wait) to get in, we 7) (see) the members of the group arrive in a big black limo. They 8) (have) bodyguards with them. Anyway, we 9) (find) our seats and 10) (wait) impatiently for the concert to begin. The Sour Grapes 11) (recently/record) an album which 12) (become) very successful. The concert 13) (last) for two and a half hours. I 14) (send) you some photos that Alex 15) (take) when we 16) (be)there. We 17) (hear) that the Sour Grapes 18) (give) a big concert in London next month. Perhaps you can see them there.