The book is _________ great value. It is well worth _________ twice.
| A．of; reading | B．of; to be read | C．with; reading | D．with; to be read |
---Mr. Black, I find ______ difficult to play the piano well.
---Oh, I think you just need to practice more
| A．it | B．it is | C．this | D．that |
He is too tired ______ any more.
| A．not to walk | B．to walk | C．walking | D．not walking |
____his surprise, he passed the exam.
| A．On | B．In | C．To | D．At |
_____should not be allowed to go out at night.
| A．Twelve-year-old | B．Twelve-year-olds | C．Twelve year old | D．Twelve years old |
---My brother is a basketball player.
---And he usually_____ very hard on the playground.
| A．has practiced | B．is practicing | C．practices | D．practiced |