{01}I didn’t have to work all weekend — I did it by _______.
A.chance
B.choice
C.accident
D.myself
解析:由于上文说 didn’t have to work,所以下文相应的语境应是 did it by choice。类似地,下面一题应选D,也是因为choice与下文的have to do it 相呼应: 本题选B。 {02}I wished to make a round-the-world tour by plane but I hadn"t enough money to pay for the ___.
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