A local radio station said that several eruptions _____ in the past twenty years.
| A．had been taken place | B．took place |
| C．have taken place | D．had taken place |
The first decade in the 21st century _______ the rapid rise of China as a world economic power.
| A．witness | B．has witnessed | C．will witness | D．have witnessed |
Those who suffer from heart trouble will find they get _______ from this medicine.
| A．defense | B．safety | C．shelter | D．relief |
many times, but he still didn’t understand it.
| A．Having been told | B．Though he was told |
| C．To have been told | D．He was told |
That was a very busy street that I was never allowed to cross accompanied by an adult.
| A．when | B．if | C．unless | D．where |
---Mary was asked to do something important.
---It doesn’t matter. Let’s the work where it is left off.
| A．take up | B．take down | C．take in | D．take off |