So little known _____ that soldiers had to ask for a guide.
| A．by this earthquake - stricken area |
| B．this earthquake - stricken area |
| C．was this earthquake - strcken area |
| D．this earthquake - stricken area had been |
Among all the means of transportation, trains are __________, cheap and the best for long-distance journeys.
| A．straight | B．boring |
| C．reliable | D．ordinary |
Instead of using it at war, scientists are turning to research into the use of nuclear power for__________ purposes.
| A．hopeful | B．peaceful |
| C．sincere | D．legal |
Devotion and selflessness are the __________ it takes to become such great people as Norman Bethune and Nelson Mandela.
| A．qualities | B．identities |
| C．shortcomings | D．disadvantages |
Life is full of troubles and sufferings. Just remember, keep a positive __________ and good things will happen.
| A．opinion | B．expression |
| C．attitude | D．altitude |
This is the first time that I_________ at the meeting.
| A．had spoken | B．have spoken |
| C．am | D．was |