肿势平坦，皮色不红不热，或微红微热，大按之乃痛而应指者为（）

A．初起有多个粟粒状脓头 

B．初起疮形如粟，突起根浅 

C．初起疮形如粟粒状脓头，坚硬根深 

D．初起光软无头，红肿疼痛，范围约6～9cm 

E．初起皮肤片状红斑，边界清楚，压之褪色，抬手即复

I hurry to school on the first bus every morning, ______ do many school students and kids.[ ]

A. which      

B. as          

C. such      

D. when