单项选择题
The ______ of a cultural phenomenon is usually a logical consequence of some physical aspect in the life style of the people.
单项选择题 I don't know you want to keep the letter. I've ______ it up.
单项选择题 She ought to make a shift now; she is in a bad mood because she ______ in the dull work too long.
单项选择题 Hemingway's enduring contribution to the human being is his insistence that grace ______ under pressure.
