When I got there, they the old people clean the house.A、helped B、are helping C、were helping
There are________people leaving the countryside to search________work in the city.
—Where is your English teacher?I’m looking for him everywhere. —He________for some information on the Internet in the computer room.
They________in the city since last summer.
I________at this school for two years already.
Those foreign friends left Guangzhou________.