A-A+
Where can I find Jim？ He is ______ his work
问题详情
"Where can I find Jim？" "He is ______ his work. He won" t leave the lab until 6:00 p. m."
A．on
B．over
C．at
D．under请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：beatsth．是固定搭配，相当于bebusywithsth．或beengagedinsth.，有“忙于……”的意思。
