—We didn't find the Blacks ________ the lecture.
—No one had told him about ________ a lecture the following day.
| A．to attend；there to be | B．attending；there being |
| C．attended；there be | D．attend；there was |
Among so many people at the party, I _______ John, one of my classmates after 20 years.
| A．looked up | B．picked out | C．took up | D．brought out |
He was about to leave the office for home _______someone knocked the door and asked for some help.
| A．until | B．while | C．as | D．when |
There are nearly one hundred foreign students in our university, most of _______ are from America and Australia.
| A．which | B．them | C．whom | D．those |
The climbers succeeded in climbing to the top of the mountains, and they owed their success to the preparations they ______.
| A．make | B．had made | C．made | D．have made |
The students expected there ____more reviewing classes before the final exams.
| A．to be | B．are | C．being | D．is |