单项选择题
One of the most spectacular qualities of man is notably his ______ to any kind of natural environment.
单项选择题 The train ______ at the present speed until it reaches the next city at about seven o'clock this evening.
单项选择题 I'm in no ______ now to go to concert with you.
单项选择题 He might have been killed ______ the timely arrival of the ambulance.
