Is this the reason _______ at the meeting for his carelessness in his work？
| A．he explained | B．what he explained | C．how he explained | D．why he explained |
After losing contact for twenty years, they met again _________ in a party．
| A．by mistake | B．by coincidence |
| C．on purpose | D．on display |
Nobody knows how the accident _________．The police are investigating it．
| A．came out | B．came about |
| C．came in | D．came down |
I tried to telephone Mary last night, but I couldn’t ________ after trying again and again．
| A．get through | B．get off |
| C．get into | D．get down |
History is the best teacher．It _________ records the development of every period, whether it is good or not．
| A．faithfully | B．typically |
| C．consequently | D．superbly |
The decision to inspect the middle school is _______ so that they can see the true situation of both teachers and students．
| A．random | B．serious | C．mental | D．normal |