The ___ look on her face showed she was ____ when she heard

The ___ look on her face showed she was ____ when she heard the news.
A amazing;amazed B amazed;amazing C amazed;amazed D amazing;amazing
-I'm not finished with my dinner yet.
-But our friends ____ for us.
A will wait B wait C have waited D are waiting
这两道题应该选什么答案 为什么呢?第二题中用了yet,是表示从过去到现在都还坚持的一个状态,是现完时啊,为什么不选C呢?第一题中在她脸上的什么表情,不应该用amazing吗?那不是修饰人,是修饰表情啊?
第一题选C

修改
D are waiting
2.不要只关注时态什么的,你看语境讲的是
我还没吃完饭
但我们的朋友已经在等我们了
这个“等”的状态是一直持续到现在的,没有结束,所以用waiting
amazed 是指 惊讶的（指人自己感到惊讶）
amazing 是指 令人惊讶的（指让别人感到惊讶）
举一个例子就很清楚了.
He has an amazed look on his face.他的脸上呈现出惊讶的表情（“他”感到惊讶）
He has an amazing look on his face.他脸上的表情令人感到惊讶（“他”的表情使看到的人觉得惊讶）