A、I spent an hour each on psychology and mathematics. B、I studied mathematics twice as long as psychology. C、I worked for four h

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问题  
Today is the last day of this term, I have two exams. So I worked for two hours last night, half on mathematics, half on psychology.

选项 A、I spent an hour each on psychology and mathematics.
B、I studied mathematics twice as long as psychology.
C、I worked for four hours last night.
D、I studied for all but two hours last night.

答案A

解析
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