Can you believe I had to pay 50 yuan for a haircut?—–You should try the barber’sI go. It’s only 10.

They say in many western countries a large number of beef cattle ________

Young people must be ready take new challenges .

President Xi Jinping demanded the environmental problems _______paid special attention to.

下列各项中，“之”的意义、用法与例句相同的一项是（ ）例句：子之武城