Question

2. —I didn't see you when I came here last night. Where were you?

  —I my project at home.

   A. was designing     B. have designed

   C. designed        D. would design

Answer 1

2. A句意:——我来这儿时没见你。你在哪儿？——我在家 设计课题。由此知“设计课题”的动作在过去正在发生，应用 过去进行时。故选A.