1 -what was he doing when the UFO landed?

1 -what was he doing when the UFO landed?
-while the boy ____,the UFO landed.
a.was in the bathroom b.was cooking
c.was walking down the street d.was sleeping
2.-hi,Mary!I tried to call yesterday morning but no one answered.
-_______
a.I'll go shopping b.I was sleeping
c.I was visiting the museum with my mom
d.I bought a souvenir
个人觉得这两个题有点问题.参考答案太牵强
各位看看讨论讨论.
乱选就别来了哈