I wonder ____ made your English teacher so angry in her class this morning.
A what was it that B how was it that C what it was that D how it was that
It was ____ I met Mr Green in Shanghai.
| A．many years that | B．many years before |
| C．many years ago that | D．many years when |
Mary speaks in a low voice; ____ is difficult to know what she is saying.
| A．it | B．that | C．so | D．she |
Was it because he was ill ____ he asked for leave?
| A．and | B．that | C．that’s | D．so |
It was on October 1st ____ new China was founded.
| A．which | B．when | C．as | D．that |
It was in the rice fields ____ we had our league meeting.
| A．where | B．that | C．in which | D．on which |