Given That "that" doesn't hook up with "Test," the 2nd clause, "that is certainly why I'm attending coaching courses," is definitely an unbiased clause (hence the suggestion in Kris's answer that "that" ought to be made use of to start out a fresh sentence), and thus can't be joined on https://msmsolutions.com/sunrise-2027-why-its-time-to-embrace-the-next-generation-of-barcode-technology/