【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】We found him ___________ in the laboratory.

【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】We found him ___________ in the laboratory.
选择一项：
A. work
B. working
C. to work
译文：我们发现他在实验室工作。