Question

—No one answered when I phoned this morning. Where were you?
—I       for teeth in the dental clinic.

A．was being treated	B．have been treated
C．was treated	D．Treated

Answer 1

A

考查时态。根据上一句when I phoned thins morning 可知，问的是过去发生的动作。故排除B。此处为谓语，排除D 句意为我当时正在牙医诊所接受治疗。