用药后在较长时间内持续释放药物以达到延长药物作用的制剂

A．缓释制剂
B．被动靶向制剂
C．物理化学靶向制剂
D．控释制剂
E．主动靶向制剂

None of us expected Mr．Johnson to _____ at the party．We thought he was still abroad．

A．turn in

B．turn on

C．turn up

D．turn over