涎石摘除术的适应证不包括

A．涎石在导管内腺体有纤维化者

B．涎石在腺体内腺体未纤维化者

C．涎石在导管内腺体未纤维化者

D．涎石在导管与腺体交接处

E．涎石在腺体内 进食有明显肿胀者

—Why didn’t you go to yesterday’s meeting?

—I would have but I ______too busy working on the important experiment.

A．had been

B．was

C．were

D．am