问题补充:
in his studies, he didn know that all the others had left.
A. Buried
B. Burying
C. Having buried
D. Bury
答案:
(答案→)A. Buried
B. Burying
C. Having buried
D. Bury
解析:考察形容词用法。本题中含有固定搭配be buried in…专心致志于…;这里的形容词buried是由动词bury转换的形容词。本句中的形容词短语buried in…是对句中主语he的情况进行的说明。句意:专心于学习,他不知道其他人都已经离开了。故A正确。