I haven’t seen you for a couple of days . What have you been up ?
76..I don’t think ____ possible to master a foreign language without much memory work.
77.Does ______ matter if he can’t finish the job on time?
78.It was not _____ she took off her glasses _____ I realized she was a famous film star.
79.I was disappointed with the film . I had expected ______ to be much better.
80.It was not until 1920 ______ regular radio broadcasts began.