―Why are we supposed to buy that flat?

―Because it’s clean and well-located, but _______ of all, it’s affordable.

A．well

B．good

C．best

D．better

在可摘局部义齿制作过程中，充塞塑料的最佳时期是

A．湿砂期

B．黏丝期

C．面团期

D．橡皮期

E．坚硬期