My brother was born _____ the morning of July 8th, 2005.
A:in
B:at
C:on
补写出下列句子中的空缺部分。
Tom rode his motorbike to work yesterday and had a crash with a car. His motorbike was ________ and he was seriously ________.
下列化石可以证明鸟类可能起源于古代爬行类的是( )