地球上的陆地面积约为149 000 000千米²，用科学记数法表示为[ ]

A．149×10⁶千米²

B．14.9×10⁷千米²

C．1.49×10⁸千米²

D．0.149×10⁹千米²

It began as just an _______ Monday, but soon became a day I would never forget.

A．ordinary

B．offensive

C．exceptional

D．appropriate