The film is very humorous, but ______ can be enjoyed unless you understand American culture.
A. nothing
B. something
C. everything
D. anything
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孩子讨厌做家务,母亲要求孩子在规定时间内较好地完成作业后才不用做家务。这属于______。
A. 正强化
B. 负强化
C. 惩罚
D. 消退
This is a talk by a London taxi driver.I"ve been a taxi driver for 1 ten years. 2 London taxi drivers have their own taxis. It"s a nice 3 most of time. You meet a lot of people. I always work at night, 4 there is too much 5 during the day. I live twenty miles outside London and I go to work at 5:30 in the afternoon.I usually go home between 2 and 3 in the morning. Some very 6 things happened late at night. 7 I was taking a woman home from a party. She had her little dog with her. 8 we got to her house, she found that she had lost her 9 . So I waited in the car with the dog while she climbed in 10 the window.I waited and waited. After half an hour of ringing the bell I decided to 11 what was going on. I tied the dog to a tree and started to climb in through the window. The next thing I knew was 12 the police came. They thought I was a thief.13 the woman came downstairs. She must 14 sleep and forgotten about me and the 15 ! (4)处填入()
A. because
B. where
C. until
D. though
每次看见“月晕”就要“刮风”、“潮湿”就要“下雨”,即得出“月晕而风”“础润而雨”的结论,这体现的思维特性是______。
A. 抽象性
B. 概括性
C. 客观性
D. 情境性
Was it not until you began to work ______ how much time you had wasted
A. did you realize
B. have you realized
C. that you realized
D. what you realized