You will not be given extra time at the end of the sub-test to check your answers, and it is up to you to manage your time. The test is designed so that the time available is enough for you to read, choose your answers, and check your work.
Please remember that there is a strict time limit for Part A (the expeditious reading task), and Part A materials will be collected from you after 15 minutes. You will therefore not have any time to check your Part A answers later in the test.