While visiting the robot exhibition, the professor kept nodding his head to express his _______ with his students’ work.
| A．description | B．congratulation | C．ambition | D．satisfaction |
It was _____ by the railway board that the cost of rail fares would be increased by ten percent.
| A．noticed | B．stated | C．suggested | D．noted |
What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.
| A．exceptional | B．strange | C．unique | D．rare |
No one imagined that the apparently _____ businessman was really a criminal.
| A．respectful | B．respectable | C．respective | D．respected |
Mary had taken _____ to see that her guests had everything that they could possibly want.
| A．efforts | B．pains | C．attempts | D．try |
Jack almost fell off the cliff, but managed to _____ until help came.
| A．keep on | B．catch on | C．count on | D．hang on |