—Where's our library?

—It's____the right side of the teacher's office. [ ]

A.at

B.for

C.on

D.in

关于单纯疱疹病毒，正确的是

A．致病性不强
B．易导致潜伏感染
C．只感染人类
D．引起带状疱疹
E．复制周期长