Don’t bother Tom he is with the experiment on water molecules in the lab. A. focusedB. f

问题补充：

Don’t bother Tom, he is with the experiment on water molecules in the lab.

A. focused

B. fixed

C. occupied

D. concentrated

答案：

A. focused

B. fixed

(答案→)C. occupied

D. concentrated

解析：查固定词组。Be occupied with…忙于…句意：不要去麻烦Tom。，他正忙于在实验室里做实验。根据句意说明C正确。