Complete each sentence with the correct form of the verb in brackets. Use one of these tenses: Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous, Past Simple, Past Continuous, or Past Perfect.
1. For the past few weeks, local scientists unusual changes in the lake’s water temperature, so they have not published final conclusions yet. (monitor)
2. By the time the evacuation order (appear) on local radio, most residents (leave) the low-lying district.
3. The climate research centre usually (not publish) public data on weekends, but this month it (release) daily updates because several storms are approaching the coast.
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