13.Scientists believe the first inhabitants of the Americas arrived by crossing the land bridge that connected Siberia and _____ more than 10,000years ago.

(A)this is Alaska now

(B)Alaska is now

(C)is now Alaska

(D)what is now Alaska.

14.Fibers of hair and wool are not continuous and must normally be spun into thread _____ woven into textile fabrics.

(A)as are they

(B)when to be

(C)that they are

(D)if they are to be

15.Margaret Brent,because of her skill in managing estates,became _____ largest landholders in colonial Maryland.

(A)what the

(B)one of the

(C)who the

(D)the one that

16.Eleanor Roosevelt set

the standard against which the wives

of all

United States

A B C

Presidents since have evaluated

.

D

17.The Armory Show,held

in New York in 1913,was a

important exhibition

of

A B C

modern

European art.

D