50. The author decided to write a novel ______ . (A)to finish the writing course (B) to realize her own dream (C) to satisfy readers’ wish (D)to earn more money

56. What can be said about MITx according to the text? (A)It is first offered as part of the edX learning program. (B) It is another free MIT-Harvard online learning program. (C) It is a standard to recognize online learners’ achievement. (D)It is a new kind of free online course of Harvard and MIT.