Is it 'open to page six' or 'open at page six' according to British English?​

Select all the correct answers. which sentences contain a noun clause? rhett was unwilling to listen to what his friend told him. jade won the frisbee competition that was held in the city park. whoever said that the early bird catches the worm was right. the cowboy threw his lasso at the bull, which quickly threw it off and raced away.