______ there is a good reason for her absence, as she doesn't usually stay away from work.
A. Incidentally
B. Specifically
C. Presumably
D. Incredibly
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Scientists are interested in the eyes of frogs because______.
A. frogs' eyes are large and threatening
B. frogs' eyes are extremely sharp
C. frogs have compound eyes
D. frogs can only see moving objects
Which of the following is true according to this passage？
A. Not until about 1960 did the word bionics come into being.
Bionics is the study of the systems in animals.
C. Bionics is the only study of the eyes and ears of some creatures.
D. People didn't know much about the science of bionics until 1960.
How did the writer get to know that the old man in the hotel had been a mountaineer？
A. He learned about it from the landlord.
Because the old man was always alone with his wine and memories.
C. He learned by the way the old man looked and behaved.
D. It was only his guess.
What can we infer from Thackery's description about Irving？
A. Irving tried to show elegance in society.
B. Irving's parents were not aristocratic(贵族的) .
C. Irving's social grace was as same as most refined Europeans.
D. Irving was inferior to Europeans of refinement.
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