Can you tell me what you __________ when the teacher came into the classroom?
A．did B．do C．are doing D．were doing
I had __________ unusual experience last week.
A．a B．an C．the D．/
Maybe you should __________.
A．call on her B．call him at C．call him up D．call up her
Our physics teacher told us light __________ faster than sound last term.
A．travels B．travel C．travelled D．travelling
Xiao Li was supposed __________ her homework before nine o’clock. But she couldn’t.
A．to finish B．to finishing C．finish D．finishing
Where was Daly __________ Linda was looking for him?
A．that B．while C．at D．where
