________ a clerk work in a store? [ ]
A. Is
B. Are
C. Does
D. Do
答案：C
有关肺炎病原体检查，可靠的方法是（）
A.痰培养
B.血培养
C.经皮细针抽吸物培养
D.胸腔积液培养
E.经纤维支气管镜抽吸分泌物培养
The girl didn't Iike to the boy to the party, but she couldn't find a way to refuse him. [ ]
A. accompany
B. attract
C. advise
D. suggest
