1. London __is_ the capital of the United Kingdom (be).
2. Someone ...is knocking.... at the door. Can you hear it? (knock).
3. What are you cooking in that saucepan? It .smells... good (smell)
4. Susan ....has worked... as a nurse for three years before her marriage (work).
5. We .....have worked..... very hard at the office lately (work).
6. You can't believe a word he says. He ...always lies..... (aways lie)
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Cho em xin ctrlhn ạ!!!