We often have to stay up for our study though we___ to have enough sleep.

A．told

B．have told

C．are told

D．are telling

造成患儿恐惧心理的常见原因是()

A．疾病带来的躯体痛苦

B．各种注射给病儿带来的不良刺激

C．各种诊断操作给患儿带来的恐惧不安

D．对医院陌生环境的不适应

E．以上均正确