–Why were you late for school this morning?

–I got up very early this morning, ________ I didn’t catch the first bus.

A．and

B．but

C．or

D．so

下列在招标投标争议仲裁中，应遵循的原则有( )。

A．自愿原则

B．公平合理原则

C．对等原则

D．一裁终局原则

E．仲裁依法独立进行原则