Because I _____ almost thirty hours, I ____ to stay over for a few days and rest.[      ]

A. had driven; decided

B. drove; had decided

C. was driving; decided

D. drove; would decide

对于收款凭证，通常选择()限制类型。

A．借方必有

B．贷方必有

C．凭证必有

D．凭证必无