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Find out a mistake in the following sentence and correct it（找出句中的錯誤，并改正）：

[　　]

My English isn’t A so B good C as him．D

Find out a mistake in the following sentence and correct if (找出句中的錯誤，并改正)：

You had better to go over your lessons once more.

[　　]

A．had 　B．to go　  C．lessons 　D．once

Find out a mistake in the following sentence and correct if (找出句中的錯誤，并改正)：

You must have to finish all of your homework before you can go home. 

[    ]

A．must have to　 B．all 　  C．homework　 D．before

Find out a mistake in the following sentence and correct if (找出句中的錯誤，并改正)：

No one is allowed to enter into the office without permission.

[　　]

A．is 　B．enter into  　C．office 　D．permission

Find out a mistake in the following sentence and correct it（找出句中的錯誤，并改正）

Which A store do B you want C to go D.