A．Universities have been trying online courses.
B．About 2,000 online courses have been offered.
C．Over 100 million people have finished courses online.
D．Stanford and Yale together have courses similar to edX.
A．It is first offered as part of the edX learning programme.
B．It is another free MIT-Harvard online learning programme.
C．It is a standard to recognise online learners' achievement.
D．It is a new kind of free online course of Harvard and MIT.
A．It feels sick.
B．It feels upset.
C．It feels sleepy.
D．It feels hungry.