The experiment ___ at the beginning of next week., will start, starts , is start, start, Scientists believe they ___ the cause soon., narrow down, will narrow down , are narrow down, narrowing down, We ___ the data step by step later today., break down, broke down, are going to break down , breaking down, I think the results ___ more accurate this time., are, were, will be , being, By next month, they ___ the conclusion., reach, will reach, will have reached , reaching, This time tomorrow, we ___ on the research., work, will work, worked, will be working, ___ we begin with the introduction?, Shall, Will, Do, Are, She ___ a phone call tomorrow morning., makes, is making , made, make, If they slack off, the experiment ___., fails, will fail , failing, failed, By next year, scientists ___ an abundance of data., collect, will collect, will have collected , collecting, Let me know as soon as you _______, will arrive, arrive, arrived, has arrived, She arrived _____ Paris., at, on, in, to, I visited this place ___ the age of 18., in, at, on, of, _____ the beginning of the experiment, everything seemed normal, at, in, on, of, ______ the beginning, I found this topic difficult, but now it’s easy., at, in, on, of.

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