Jack worked _______ a long time in the afternoon and he was tired. A. at B. in C. for
They're ________ football. A.plays B.play C.playing
They are ________ a dragon boat. A.row B.rowing C.rows
There are lots of people ________ the lake. A.in B.under C.on
Look ________ the people in the park. A.at B.to C.with
Let's get ________ the bus. A.inB.onC.up