I work at five p.m.and then go home. [ ]
A.do
B.does
C.start
D.quit
答案：D
在某注射剂中加入焦亚硫酸钠，其作用为
A．抑菌剂
B．抗氧剂
C．止痛剂
D．络合剂
E．乳化剂
“Goodbye, then," she said, without even from her book. [ ]
A. looking down
B. looking up
C.looking away
D.looking on
