The guide taught us how________ a model robot.
—What did you do yesterday?—My brother took two friends of ______ to play chess with us. But I don’t’ know ___ of them.
_____people went to the concert that was held in Reming Square _____ the night of May 25.
We will see __________ even stronger China in __________ near future.
It ______ me three hours to finish the work.
Finally, Mary made the baby ______ and the baby began to laugh.