I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.
A．mustn’tB．needn’tC．shouldn’tD．couldn’t
B

試題分析：句意：我不必使用鐘來叫醒我，因?yàn)槊刻煸缟?點(diǎn)火車從我家旁邊經(jīng)過。四個(gè)選項(xiàng)的含義分別是：A. mustn’t 禁止，B. needn’t 不必，C. shouldn’t不應(yīng)該，D. couldn’t不能，所以選B。
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