现在进行时描述正在进行的动作 — 英语选择题
题目
It is 7:30 in the morning. Tom can't find his schoolbag. He is looking for it everywhere. His mother asks, "What are you doing?" Tom says, "I ___ for my schoolbag. I can't find it!" Which answer is correct? A. look B. looks C. am looking D. looked