34. He had no sooner arrived there ________ pestering his doctor.
| A．and then he began | B．when he began | C．to begin | D．than he began |
The roof fell ______ the PLA men had time to rescue the child trapped in the house.
| A．until | B．unless | C．before | D．because |
When he ______ the front door, he found his keys were nowhere.
| A．would open | B．opened | C．had opened | D．was to open |
The university with two____ campuses has a student population of 50,000 in total．
| A．unique | B．separate | C．single | D．alternative |
Faced with_______ failure, it is the most important for us to keep up ______good state of mind.
| A． / ; a | B． a ; / | C． the ; / | D．/ ; the |
All the tourists _______ about the bad service in that restaurant.
| A．explained | B．expressed | C．promoted | D．complained |