Many people took part in 10,000-metre race, but only ____________ them kept on running to the end.
I _____ my homework at home yesterday.
Does Zhao Ping ___ his father or his mother?
Some of the volunteers hope to continue ________ in the village after_______ some time with the villagers.
It took _________ people _________ the work.
The teacher ______ the class_____ small groups.