单选题 Most drivers ought not to drink at all at lunch time because _______.

A、 alcohol will be less potent after lunch
B、 a pint of beer at lunchtime is equivalent to a quart in the evening, it cause afternoon sleepiness
C、 people are more alert at lunchtime
D、 it is not legal to drink at lunchtime

【正确答案】 B

【答案解析】大多数司机不应该在午饭时喝酒，是因为?[A]“午饭后，酒精的效力会减弱”；[B]“午饭时喝一品脱啤酒的效力相当于晚饭时喝一夸脱的啤酒，这会引起下午困倦”；[C]“人们的警惕性在午饭时更高”；[D]“午饭时喝酒是违法的”。文章中提到“It seems that…to a quart in the evening”，由此可见，[B]正确。