Question

What ____________ at nine o’clock last Sunday morning.?

A．was you doing	B．were you doing
C．are they doing	D．do you do

Answer 1

B

此题重点考查过去进行时的特殊疑问句的基本构成。表示过去具体时间所做的事用过去进行时，结构为was或were doing，第二人称you用were，故本题选B。