The boy was so______ on his stamp collection that he did not hear my footsteps.

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问题 The boy was so______ on his stamp collection that he did not hear my footsteps.

选项 A、absorbed
B、engrossed
C、engaged
D、intent

答案D

解析 词组be intent on:专心致志于。词组absorbed in:全神贯注于,一心—意。词组engrossed in:全神贯注于。词组engaged in:从事于,致力于,忙于。后面几个词组都有差不多的意思,只是在介词上的搭配配不上。
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