----Has the National Indoor Stadium been completed?
----- Not yet .It’s still _________ construction.
| A．in | B．at | C．on | D．under |
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 |
It was through Xiao Li ____ I got to know Xiao Wang.
| A．who | B．whom | C．how | D．that |