下列何药胃肠吸收好，可供口服给药（）

A.头孢唑林

B.头孢氨苄

C.头孢羟氨苄

D.头孢孟多

E.头孢噻肟

Such a good opportunity may not come again, so you ____________ let it go this time.

A．hadn’t better

B．wouldn’t better

C．would better not

D．had better not