单项选择题
Though it was late in the night, ______ he continued to work vigorously.
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.
