I _____(read)a history book when someone __(konck)at the door.the driver__(drive)home when it ___(rain)last night.Doctor Liu was on duty last night.He ___still _(work)in the hospital at 10pm.thank you for___(help)me carry the basket.look!One of them____(swim)in the lake.
问题描述：
I _____(read)a history book when someone __(konck)at the door.
the driver__(drive)home when it ___(rain)last night.
Doctor Liu was on duty last night.He ___still _(work)in the hospital at 10pm.
thank you for___(help)me carry the basket.
look!One of them____(swim)in the lake.
答
I was reading a history book when someone knocked at the door.
The driver was driving home when it rained last night.
Doctor Liu was on duty last night. He was still working in the hospital at 10pm.
Thank you for helping me carry the basket.
Look! One of them is swimming in the lake.
答
was reading knocked
was driving was raining
was working
helping
is swimming