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16. I used to ___________ children who wanted to do a sport.

        A. volunteer           B. change               C. coach                              D. improve

17. No one can’t stop him from reaching his dream. He is really a ______ person.

    A. decisive                B. responsible        C. reliable                          D. determined

18. Teenagers ought to live________. It is impossible to rely on their parents all times.

    A. indenpendent     B. independently  C. dependently                D. independence

19. He always completes his tasks on time, and never needs _________ about assignments and other schoolwork.

    A. to remind             B. to be remind     C. to be reminded                      D. to be reminding

20. While most of students gave up, he ______ the whole night on a hard Maths problem and solved it in the end.

    A. spent                    B. took                    C.  had                                D. made