1. Someone called me up in the middle of the night. They hung up before I could answer the phone. It (a) (not be) my brother; he doesn't have a telephone. It (b) (be) someone I know, but why would they call in the middle of the night? It (c) (be) a wrong number.

2. Where were you last night? I thought you were going to join us at the movies. You (a) (have) enough money to go with us, because the tickets weren't that expensive. It's too bad you didn't come. I (b) (be) able to lend you the money. Or perhaps Peter (c) (pay) for your ticket. He's so generous. The movie was really funny. You (d) (be) disappointed to miss all the fun.

3. Sally looked really unhappy as she was leaving school. She (a) (failed) another exam. I know she's already failed one midtern, and she had two more last week. It (b) (be) her chemistry test. I know she was really nervous about it. But it (c) (be) her calculus exam. She's really good at mathematics, and I know she studied a lot for it.