— Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copperfield with you.
—____. Who knows when he will be back here next time?
| A．It doesn’t matter | B．Do as you like |
| C．What a shame | D．Take it easy |
77.Does ______ matter if he can’t finish the job on time?
| A．this | B．that | C．he | D．it |
78.It was not _____ she took off her glasses _____ I realized she was a famous film star.
| A．when , that | B．until , that | C．until , that | D．when , then |
79.I was disappointed with the film . I had expected ______ to be much better.
| A．that | B．this | C．one | D．it |
80.It was not until 1920 ______ regular radio broadcasts began.
| A．while | B．which | C．that | D．since |
81..______is a fact that English is being accepted as an international language.
| A．There | B．This | C．That | D．It |