(    )7.         are the most popular pets.

A.Dog     B.The Dog    C.Dogs    D.A dog

(    )8.Dogs are         to people.

A.friendly      B.friends      C.friend      D.make friends

(    )9.Dogs are too         to take care of.

A.more difficult    B.the most difficult

C.difficult         D.difficulty

(    )10.Mrs Green is a         woman.

A.30 years       B.30 year     C.30-years-old     D.30-year-old