When it comes to the human tendency to use the right hand much more often than the left hand, we seem to have __________ it from our animal ancestors, namely monkeys and chimpanzees.
Jack wasn’t saying anything, but the teacher smiled at him ___ he had done something clever.
Fitness is important in sport, but skills are of at least(至少) ______ importance.
-- Why have you bought so much food? -- My good friends _______ to stay with me for the weekend.
His father told me that he ______ for the United States three days ______.
Don’t mention that at the beginning of the story, or it may _______ the shocking end.