At our factory there are a few machines similarto _______ described in this magazine

下列各句中，没有语病的一句是(　　)

Must I return the hook tomorrowmorning —No, you _ .You can keep it longer.

Jack, what’s your main reason for choosing one restaurant ______ another?

Here is such a difficult text _____ none of us can understand.Here is such a difficult text _____ none of us can understand it.