—Stay a bit longer it’s been such fun having you. —Thanks anyway. I’ve got early start

问题补充：

—Stay a bit longer, it’s been such fun having you.

—Thanks, anyway. I’ve got early start tomorrow morning.

A. /, the

B. a, an

C. /, an

D. the, an

答案：

A. /, the

B. a, an

(答案→)C. /, an

D. the, an

解析：fun 抽象名词不可数；一个更早的开始，特别所以。